Right ds has always been a pain to eat, which i now think was possbily silent reflux although i can't be quite sure. I managed to convince docs that things weren't quite right although they seemed content to sit and wait until he started loosing weight!!
anyway when i convinced them they put him on gaviscon which worked for a week and then stopped and finally after much advice from people on here he has been prescribed Enfamil (which as people also said the docs had no idea about) and he now eats his bottles no problem and sleeps through 8pm-7am only waking as we go to bed at 11 for a feed!!!!
thank you all so much for the advice!!! im so much less stressed now! Well in this department anyway!