Thanks everyone. He was way too young to be taken away from his Mum, only 5 weeks old when we got him so I know this is why he is like he is. Poor baby.
He's a lovely boy generally. A bit grumpy, doesn't like being handled much, has never sat on my lap but does like to be stroked and purrs a lot. He will be purring away happily and just give you a nibble, not even aggressively, just like he is confused and thinks it is affection. I think he just likes his own space really. I will give the feliway a try. Also thought about getting another cat bed, he rejects most of them but if he has somewhere just for him it might help a bit. I am pretty sure he is just an anti-social fella and Mylo is very friendly and likes to trot around after him and cuddle up to him, I think it would annoy me!
Trust me to have dysfunctional animals.