London charm at its best! Loved the plot!

I saw this film on TV for the first time yesterday, and, without knowing its name or the channel's name, I found myself stopping from zapping and starring at the screen enjoying what I was seeing. It took me a while till I found out the plot, since I started watching it about 30 mins in already. The combination of hidden posh London locations and a weird, quirky, lovely plot grabbed my attention. I always had and still have a weakness for London since I spent years studying there. What I liked the most about this film was the use of real locations in London - all the restaurants they visit exist in reality and the sandwich shop she works in. This means I can personally go to those places and have lunch if I want to.
The plot was unique in my view and lovely at the same time! Does anyone know other films with a similar plot? (past bullying turned into attraction/love)