If you get only 5 free techs, you're doing it wrong. You get 4 easily from religion (pantheon, founder, enhancer, reformation) and 4 easily from culture (finish 3 policy trees and opening ideology). While England also gets free techs, they can only get techs that others have. Basically that means you'll get techs that have relatively low science cost. If you are at science lead, it's next to impossible to get techs with England. I just finished piety tree with Ethiopia and took free archaeology before researching steel.