@ General
There'll be more at
this thread about other players (including ptt) playing civilizations on the Earth map at Emperor difficulty.
@ England specifically
It's the slowest and most isolated start, setting you behind in the race to railroads, industrialization, and tanks. It's the dullest start since, even with an early democracy and the Colossus, staying on Britain for the whole game
will cause you to lose the space race. You have no real choice about making a beeline towards Wheel and Mapmaking asap. That leaves you sitting around for ages as your not terribly productive home builds your trireme, some chariots to establish a beachhead on a hostile continent, and settlers. In an unlucky game, you can even get mauled by randomly-generated pirate barbarians.
Your only real decisions early on are
(A) whether to move your settler north to have a single city for Britain or to stay at London and build a second city for Scotland; and
(B) whether to colonize the Americas or pull a Constantine and invade Europe. It's a safer route to head towards the Americas, but it's definitely possible to overrun France, Germany, and/or Rome with two or three veteran chariots if you attack before the walls go up. You could even luck out and capture some AI-constructed wonders. The real risk is that you're in a game with Russia and they've spawned enough units that you can't get a real foothold until you've left to build up a base in the Americas after all; in that case, you've wasted a thousand years or so and can end up too far behind in tech against the Aztecs, Zulus, or Australians. If you do establish yourself on the Continent, a city in Scotland makes an excellent settler factory, producing new units just around the same time the city size ticks back up to 3.
Depending on how easy you want to make it, you might restart a few times until Scotland has coal, Cornwall can turn into deer-filled woods, or both.
Worth mentioning that, like with Arabia in a Babylonian game, British settlements in Greenland and Scandinavia are very productive w/r/t research arrows even though they're not terribly useful otherwise.
@ Ptt's game
Looks like you lucked out, with the Zulus getting stomped fairly early on. Earth's Russia can be a painful spawny mess early on, but it seems much less common for them to switch to a republic and put up a real contest later in the game. (Ymmv, though: unless I'm in the Americas, I tend to be sure to stomp all over Russia as soon as possible, giving them little chance to even make it to the late game.)