My old practice grew and opened a second centre on the opposite side of town, thus covering the whole town where there are loads of practices many within walking distance. Then they cut the area covered on this side, out of town, so that us on the edge now have fewer and smaller practices to choose from (not sure if they all have catchments too).
Ben is interesting - he does 'Bad Science'. He seems to work a lot with Margaret McCartney who is on Inside Health on R4.