Thanks for the tips sugarkane. Only one concert to see during my visit and that will be the Marshall concert at Webmbley Arena. I found a brand new Hilton directly across the street from it but the Hotels in London are rather expensive. Some of them are dumps too.
I will have about 3 days free total to visit the city, plan on taking the tube and checking things out. I am a bit confused about the food, I know I don't want anything like bangers and pie. Oh well, I am sure there is plenty to eat. The War room of Churchill might be interesting, he really was a great leader IMO. Really looking forward to seeing the city for the first time, seeing the Marshall factory and seeing Steve and Chris. I know Chris gets to perform at the concert also so this will be a big night for him.