Here’s a thought for Northampton. Knock down the bus station, adjacent car parks, and as much of the area around it as you can. Even perhaps the Grosvenor Centre. Build a huge subterranean, multi-storey car park and turn the top of it into a large square and park area. The car park itself should be well lit and have some architectural detailing to make it look attractive. Arrange bus stops and shelters along one side, but only allow buses and taxis there.