The only reason Southern trains from FH/HOP are proposed to be cut to London Bridge during the morning peak is so London Overground can add another two trains per hour to Dalston Junction from Crystal Palace, where the demand is strongest.

The current signalling can't handle the proposed extra Overground trains without cutting Southern services.

The Catford loop issues aren't directly connected to the problems affecting Forest Hill. They really need 4 trains per hour as the peak services especially are at crush load and will be integrated into the Thameslink core, where as our trains aren't.