Everything is cheaper in London. We bought our pram and as much as we could bring in our luggage. There is also more of a variety there. Another good trick is to get a travel bag for your pram and pack it with stuff. There is plenty of space.
I brought back everything (sterilizer, bottles, towels, clothes, sheets, baby monitor, night lights etc) as I was in the UK for the first two months as my son was born there.
I haven't been able to find a waterproof mattress protector here, but luckily I brought one from London. It might be worth thinking about it.
Happy shopping!
I did it and it was brilliant. It is a little hard to get into the swing of it to begin with, but once you getting going it's not that bad. I didn't do it properly as I didn't come off it as one should as I got pregnant, i.e. introducing foods back into the diet and doing one day a week of just protein. But it still worked and I kept the weight off. I will do it again as soon to lose the extra weight I gained during my pregnancy. Highly recommended.
Good luck to those on it or about to start. :)