I haven't been to C# House for many years, but the reason hasn't been the difficulty of getting there.

Don't get me wrong, I don't think the building is suitable, and I have no sentimental attachment to it. However when I start to think where else it could be situated, then there seems to be no realistic alternative to London. Most other locations would be even more difficult to get to for the majority of people, many of whom would have to go via London anyway (you mentioned Suffolk: Ipswich to Derby takes more than 3 hours and goes via London St Pancras).

Dick, for me Derby takes about as long by car as it would by train. Just because the Midlands are in the middle of the country doesn't mean they're accessible to everyone.