In reply to Fuzzface93:
I found most of the walls in London to be much of a much and often the route setters will work for a number of the different walls as well as having their own internal teams.
I agree with you on the Works, the problems are good and more real like, though I think part of this is down to the layout of the wall.
For most walls, the vast majority of the panelling is laid out against the internal sides of the building, leaving the middle open and empty. However with the Works it is the opposite, only the ends of the building have walls and most of the panelling is free standing in the middle of it. I think this helps having more aretes and shapes, and different angles, this more varied layout allows for better problems. Though more straightforward flat panelling may be easier to work with and its the more standard/generic way to go, however I don't think it provides the best problems.
If you do move to London, just swap and change about the different walls, though indoors will always be second best to the outdoors.