Verified answer

London isn't THAT expensive, believe it or not. I'd say, as you'll be eating out, sightseeing and preferably doing a little shopping each day, oh then there's the travel costs to include. About... £50 per day.

I was there in January. My boyfriend and I brought $200 a day to spend on the two of us. That is about 120 GBP. We ate mostly pub food and walked or took the tube everywhere. We didn't buy any souveniers, but did have lots of pints!