Can i swap my black iphone for a white one?

I have recently drowned my iphone 4 but i'm going to the apple store to replace it. I had a 32gb black iphone 4 and i'm currently using my old iphone 3. Do you think that it would be possible to go to apple and ask for a white iphone even though they usually give you exactly the same iphone that you had for £100.

Ask Apple.

You would have to ask them at the apple store. Each store has it's own policy.