Thanks for your reply... its not a constant leak... when it gets to under half a tank i dont notice no puddles... and the smell is not as strong either.
I shall have a look under the seat though and let you know how i get on.

Hi, I have a 206 Roland Garros 1.4 (2000) I have noticed that when I top up, I get to half a tank, when I have pulled up somewhere I notice I puddle under the rear passenger door. I have smelt it and its definitely petrol. I have read that this is some what of a common problem, but I would like to k...