Spotted...

I think i may flip the wheel tonight and try it. I consider myself as very fit so the biggest concern apart from stoping the bike would be cycling on very bad roads with loats of wholes when i'm normally standing/not pedaling.

From my experience you'll try to freewheel once a day for the first week or so, it's mildly disconcerting though so the message soon sinks in.

I still use the front brake for a lot of my stopping, especially if needs to be done quickly. I do go through phases of breaking with legs but I started cycling due to the non-impact nature of it (I have a dodgy knee from cartilage removal) and the fixed gear breaking with your legs seems to move it towards an impact activity.