Raffles - those are really really bad examples.So how does a leg less player play football/rugby? How does an armless person swim? How does a blind person play darts/bowls/cricket?
So, not all sports include all people. I think that "Sport England" link means that you can't actively discriminate. I'm sure if any 'disabled' person came up to any of us and asked if they could play - we'd give them the chance (at least, I'd hope so).
The sport England thing - You're right - I may be interpreting that wrong. In which case i guess i have no leg to stand on.