I'd certainly rather ride a more traditional off-road race on a good course though I suspect an "urban" race would be easier to promote and pull in a crowd. Supercross and Muddy Hell have always done alright in that sense though: bring beer and they will come. You'd need some elevation, stairs, cobbles, changes of surface, etc to make it interesting, rather than just a car park, tape and some planks. I can't think of anywhere in London off the top of my head. Overall, I reckon much harder to organise and find a venue than a normal 'cross race.
There's a real lack of venues actually in central London, Herne Hill being the only regular that's used. It's a shame Alexandra Palace doesn't seem to have worked out.
I'd certainly rather ride a more traditional off-road race on a good course though I suspect an "urban" race would be easier to promote and pull in a crowd. Supercross and Muddy Hell have always done alright in that sense though: bring beer and they will come. You'd need some elevation, stairs, cobbles, changes of surface, etc to make it interesting, rather than just a car park, tape and some planks. I can't think of anywhere in London off the top of my head. Overall, I reckon much harder to organise and find a venue than a normal 'cross race.
There's a real lack of venues actually in central London, Herne Hill being the only regular that's used. It's a shame Alexandra Palace doesn't seem to have worked out.