Sorry, I don't do psychology so I can't give a fully rounded response. I would say that economics and english lit (unsurprisingly) don't complement each other very well, but it genuinely does not matter because they are my joint favourite subjects. There is alot to do for English Lit (so much poetry, two novels, play, shakespeare play, coursework). However, all the tests are open book so memorisation isn't that much of a challenge - just make sure you're good at writing.
As for economics, i adore the subject. it's also not got that much content (compared to my other subjects). the first theme is very easy anyway, and the diagrams are easy once you wrap your head around them.
Hopefully you find someone who does psychology here, too!!