The problem with using Forest Hill as a terminus is where you turn the bus around. I guess it could come up Westbourne Drive, use the Bus Stands and then return down Perry Vale. Can the buses make the left turn out of Westbourne Drive and off the South Circular onto Waldram Place, or are the corners too sharp?

I suspect that the service was shortened as it required less buses and therefore cost less to run and Bell Green is a much easier turn round point.