Four swordsmen, four trebuchets and two longbowmen? That's pretty hard on iron, isn't it?
Rather try with;
4 Longbows
4 Pikes
2 Trebs
You just need the pikes to 'hold the line' and advance slowly

Four swordsmen, four trebuchets and two longbowmen? That's pretty hard on iron, isn't it?
Hmm. Alright. Apologies if any of this reads as overly critical, that certainly isn't my intent. Also, I typically play Immortal on Standard sized maps so all that space you have to work with is throwing me a bit. That said, I think you should look at your city placement and development a bit more.
As you say London has the Colossus but the Fish immediately south of it has no fishing boats on it? It's also unable to work fish and pearl tiles that are inside its radius because culture hasn't expanded there. Those tiles should've been bought at the earliest opportunity. Without them, the power of the Colossus is effectively halved.
Was there jungle on any of your plains tiles by the river? I spotted a few dotted at random on the map. Had they been by the river, Trading Posts would've done very well there. That might be a bit much to hope for though.
I see where you're going with the National Epic, but the lack of a National College struck me as odd. The NC is one of the best science buildings in the early game and you can stunt your research potential significantly without it.
York is a bit confusing. There are two large iron deposits, four food resources and a pearls that could've been York's had it been founded on the hill 1 NW of the Banana just outside London's radius. That was the ideal location for York, even if it encountered a bit of overlap with London. As it stands, I assume it was settled where it was for the river?
Regardless, York should have been farmed like no tomorrow and there are very few improvements or buildings there (esp. in comparison to Nottingham). Has it been doing something else that I'm not seeing, or is production there as bad as it looks? Oh, and the Mt. Fuji tile should be purchased asap, before Helsinki gets it.
Nottingham is better, like you say. It seems to be improved with Trading Posts though? Even on non-irrigated plains, Farms are better than TPs because there are comparatively more benefits from Food production than from Gold production.
The only exception to this would be TPs on Jungle tiles. That said, there's a better city spot for Nottingham about 4 tiles N. You see where the encampment is? You can reach 2 fish, 2 wheat, 1 horse and 1 pearl from there. It would have weak production, but it'll generate a lot of food. A higher production city could have been built 1W of that mountain in the south getting Fish and Horses into the bargain. No access to the water unfortunately, but still decent.
Rio de Janeiro was a nice catch, but Helsinki may have been better. H has Iron and Dyes compated to RdJ's Ivory. H also has a better strategic position and has a mission for you to take out RdJ. So taking out RdJ would give you H as an ally and RdJ's Ivory.
Your tech work looks better, much better in fact. The worker techs followed by beelines for Iron early and Astronomy is good play for England. Archery and Trapping could've been skipped, but that's just nit-picking.
One major point is that you should never research Astronomy when beelining for it, there are easier options available. A Great Scientist from the Liberty Finisher, Hagia Sophia or Porcelain Tower should bulb Astronomy while you're backfilling Techs after the beeline. On that point, Theology should always be researched before Compass - this will allow you more time in which to build HS. Not sure if HS has been built in your game yet or not, I forgot to check.
The Social Policies picks are curious. It's possible I'm missing something here. If you start Liberty its usually finished to get the free Great Person. If you are mixing and matching then the best combination in normal circumstances is Free Settler, Free Worker, Legalism, Monarchy, Landed Elite. Aristocracy and Oligarchy are generally weaker. Your position looks secure enough that Oligarchy could probably have been avoided. Aristocracy is grand as you went for some early game wonders, but why did you avoid Legalism?
Last point is that your scouting appears to have nose-dived after you met a few Civs. There's a few tiles south of London that are worth a look, and there's no reason why 1-2 scouts couldn't have been spared to fully explore the continent to the north.
As to what to do now though. First, buy the Mt. Fuji tile asap. If the point of York was to get Fuji, then you should make sure Helsinki doesn't get it. Second - take out RdJ and ally with Helsinki. Your economy is okay, not great. Check the demographics for GNP, you're leading the bottom half of the leaderboard, I reckon. I wouldn't say Diplomacy is out, but there's much less room for error on Standard speed than Marathon, so perhaps someone else may better comment on that.
If I were you, I'd focus on getting farms up on all the flat land and increasing your happiness. The Commerce opener and the Patronage tree are what you want for Diplomatic win, but the economy needs to be righted first. Change from researching Compass to Theology if the Hagia Sophia or Notre Dame are still available and try to nab both. If you can't leave it as is. Finish the beeline to Astronomy and then double-back for Construction and get Colloseums and the Circus Maximus up while you're off exploring. If you decide to try for Cultural instead, get Monarchy and Meritocracy asap. Regardless I'd probably focus on keeping the number of cities you have after you take RdJ. Except, perhaps, for a city on the grassland hill between York and London to grab those 2 iron deposits (6 and 2 respectively). Make sure though that it's on the grassland hill and not the plains one, you want to be able to build a stoneworks there.
Wall of text... fantastic. Anyway, hope this helps some.
The National College was one of the buildings I wanted to produce in the near future, but I guess now it will be delayed a bit because I'll have to build work boats. Next time, should I construct the NC first and the NE later?
I mostly chose that tile over the one you suggested because your suggested tile has no access to any ocean tiles, meaning it won't profit from any commerce policies and I'll have to construct a trade rout towards it, costing me precious money.
Hmm, I've heard both sides of the argument. Some people (on this very board) claim trading posts are better because you can use their gold to ally a maritime CS, improving your growth and getting additional benefits. Would you say this is correct or doubt that claim?
Again, for Nottingham no access to any sea tiles was a deal breaker here. I'd like to have naval acces with all of my cities to:
-Benefit from Englands naval military advantages
-Construct a harbor, eliminating the need for expensive (rail)roads
-Benefit from the Merchant Navy social policy, giving naval cities extra production
Not trying to doubt the validity of your counsel, but are you sure Helsinki would've been better? They have iron in addition to a luxury resource, but they're also hostile which means their friendship points will degrade twice as fast, right? Nevertheless it seems a good idea to wait until my relationship with RdJ degenerates to the point where we're no longer friends, and then conquer their lands.
In the beginning of the game I found two culture ruins and spent my first two policies on the tradition and liberty opener, boosting my culture output. After that I got the free settler and free worker, and aristocracy for my wonders. In retrospect oligarchy might not've been the best choice since I'm in such an isolated position, but it gives the AI an impression I have a sizeable army without having to spend money on upkeep.
As for avoiding Legalism, there are two reasons for it: first of all, I wanted to ensure all of my cities had at least a monument, so I'd get temples out of it. Secondly, since it applies to your first four cities and I only have three, I figured I should construct a fourth city to get the best out of it. That's pretty much why I delayed it.
The lack of a financial aspect to England is a bit surprising. Has anyone else noticed though that all of the European factions have two unique units rather than a unique unit and unique building? I'm not sure whether it's coincidence or a conscious decision, but it always struck me as odd.
1. Yes. Mongolia has 5 archers and 5 of their Keshiks around Quebec and (judging with some scouting with the caravel), another 5-10 units scattered around the place. The poin though is that you're a tech era ahead, although the lack of good defensive terrain is a problem. Your 3 Longbows, 2 Muskets and Longswordsman should be sufficient to take out their major force. If it were me, I'd prefer to have another 2 Longbows and another musket. Some people will tell you that you lack siege equipment - don't worry about that. Longbows need experience asap for Logistics and the other high tier promotions, and once they get Logistics they'll be grant for taking cities.
2. Honestly, if you take all of Mongolia then you shouldn't need for any more cities. If you want to stick with the overseas empire theme, then there is one good spot 1 tile west of the hill of the small snowed in island to the south of Mongolia. That can reach all of the resources on/near that island.
3. Navigation, without a shadow of a doubt. Although I am curious as to why you went for Acoustics. After Navigation get Rifling. At that point if you don't have a definite victory condition in mind, you need to settle on one.
4. This is definitely down to personal preference. Longbows will always do at least one damage and with three range they're reasonably good until Artillery start showing up. There are two important points here, Logistics and March carry over during the upgrade and Longbows will gain experience quicker than Riflemen because they won't have to stop to heal and can easily bombard a city from range for as long as they like for XP.
5. The game is shaping up rather nicely. I'm assuming you're going for Mercantilism next for the discount on purchases? If you're going for the diplo VC, you need significantly better gold. A good rule of thumb is to have a stockpile of 1000 gold for every CS you already have allied to you and 2000 gold for every CS that you don't. At least, that's what I've always operated for Diplo and its worked so far.
Took a brief look.
Science still could be better. Assign scientists on universities slots. They are built for reason.
I'll do that, sounds like a good thing.Sell spices, iron, open borders.
Rush two additional longbows in Coventry.
....That's smart.Genghis has 8 keshiks. This means if you pillage 4 horses near his capital north from your longbow, all of them will suffer 50% penalty. Take Turfan with another 4 horses and Mongols are over.
Is science really so important it justifies taking rationalism even without going for a science victory? I'm just curious.Veneke is right about VC. At this point you have to decide. Anyway, I'd pump science regardless. Pick Mercantilism next and Rationalism after that. Leaving Commerce finisher for later. Then finish the left side of Rationalism. Try to boost culture to be able to get Scientific Revolution in time. After taking out Mongols trade multiple incense for unique luxes and happiness-wise you're set. Since you don't have PT, RA output is limited to 75%, yet it's better than nothing. Way too many opponents left to skip this opportunity. Start signing RA's and generating GS's.
I'm not sure... I could do that after my colonial war, but does the porcelain tower, a single world wonder, justify taking a huge diplo hit with not only Hiawatha, but perhaps other world powers?Maybe you can go and bug Hiawatha and take his capital with PT. If you're lucky and it's coastal (scouting still sucks, sorry), that shouldn't be too hard with SotL's. Bismark already hates him. He'll help.
If you go for science, you don't need to do more than listed above. Sit back, TP Mongolia, grow and manipulate the median. You'll win. For diplo try to get resource revealing techs first and sell, sell, sell. Don't bother to ally CS's yet.
Domination is a bit trickier. I don't think there is a good reason for fighting with Renaissance units. I'd research towards Dynamite and start killing people on the main land, since they are so weak, while staying friendly with everybody in 'the new world'. To deal with them I'd aim for tanks+nukes or even stealth bombers. Land wars across multiple fronts are very tiresome. But that's me. Some may like it. In case you don't, if you build Brandenburg Gate + barracks + armory + military academy you'll get stealth bombers with logistics on the spot. They will do the job very quickly. 30 or so turns and game is over.
I'd still settle 2-3 cities between you and Persia after finishing Mongols. You'll see the happiness situation, but should be alright. Settling another city on new continent isn't necessary.
Things look good.
1. Is being a tech era ahead good enough? From what I've heard around these forums Keshiks are game winning units, strong enough to remain relevant until tanks are introduced to the field of battle.
Is that really the best thing to do? I already have my merchant slots filled, and filling my scientist slots would mean having less laborers on the land, hampering my growth and gold output.
Is science really so important it justifies taking rationalism even without going for a science victory? I'm just curious.
I'm not sure... I could do that after my colonial war, but does the porcelain tower, a single world wonder, justify taking a huge diplo hit with not only Hiawatha, but perhaps other world powers?