I used panacur five day and it did the trick. Also clean the anus area twice a day with a wet wipe and smother in Vaseline, it stops the worm from being able to lay the eggs outside of the bottom.
Thanks for all your replies, after speaking to the vet they have suggested a ivermectin only wormer and mentioned to me that pin worms are on the rise due to many of us doing worm counts (these don't detect pin worm) and only worming twice a year with dual wormers which dont deal with pin worms.....interesting !!