It's a football stadium that hosts all kinds of pr...

It's a football stadium that hosts all kinds of professional meetings and conferences. It does the job. But be prepared for football coaches and B team players to come walking through your private meeting rooms as a short cut and middle management types to be loudly talking to colleagues walking through a private meeting / conference because they can't be bothered to walk round and argue if you ask them not to.
Good parking, variable quality of signage. Convenient for the M61 and railway.