It's competition time! No, I need help....

[whatyadoing]

I am really bad at managing to find good deals on flights (don't fly very often).
I need to book a return flight (1 person) from London to Barcelona.
Out on Wednesday 29 August. Return Monday 3rd September.
Cheapest obviously. Ideally cheap check-in bag. Ideally not stupid o'clock in the morning.
What website would you recommend? Expedia?
Any search wizards out there who can come up with some amazing deals?
Lots of good karma to the winner.

Sorry to re-open this thread, but I can't for the life of me find my email confirmation of this booking? How am I going to prove I have tickets?

Did you buy them through the airlines website?
If so you should be able to login there and see the details. With easyjet and klm you get reminder emails to check in if you haven't.
Otherwise call them. You will have the transaction information on you bank or credit card statement to prove you paid.