I have no idea what species my cat is, can anyone identify?

To me, Ollie looks like a grey and white domestic short hair. That is basically a common cat. It has slightly longish fur but I highly doubts it's pedigree. My cat looks like she might be a Russian Blue or Korat, but I know very well she is not. Just because it might look part ragdoll, it isn't. Might you, that is lucky. Domestic Short hairs are the best sort of cat you can get.