Thanks everyone for your replies
I took my cat to the vet yesterday and he has given him an antibiotic injection that lasts for 2 weeks. He told me to bathe it with iodine and that it should be fine, he also told me to put sudocream on it to act as a barrier but i find that very very strange so i am not doing that bit.
This morning it have had a good look and it looks more like a split straight through the paw pad from one side to the other, so it looks like the paw pad is in two halves if you know what i mean. It has scabbed over but he keeps cleaning it and making it bleed again.
I will see how it is over the next couple of days but i may have to take him back. He is not limping and it doesn't seem to bother him at all.