We were in London for a wedding a couple of years ago and as we had an afternoon to spare we decided to investigate BG. We caught the bus to Chiswick and asked the way to British Grove (the street name). There was a garage on the corner and someone remarkably like MK was looking at a car - it was a bit of an old banger, so probably not MK! Anyway we continued down the street, which was lined with the backs of houses and eventually came to the building, which was obviously BG studio. The sliding doors were open and a window cleaner was cleaning the windows. We stopped to talk to him and asked if anything was happening inside. He said there wasn't anyone there, but when we looked through the doors there were people inside and we could see the harmonium.