I suspect that when this east London service comes in, any late running London Bridge train will be diverted on to the fast track to new cross gate.
Watching our train sail past a few times will condition us to take the the first train to New Cross Gate in the hope of picking up any late runner there.

With the LB bound passengers from Forest Hill, Honor Oak and Brockley all converging on NXG, I imagine this station is going to get seriously over crowded.

NXG currently gets no extra London service - now if they stopped some of the trains from Brighton at NXG - lovely - straight through to platform 6 at LB, and also connecting us up to Kings cross and beyond then this palava starts to make sense.

We would at last get some benefit of the Brighton service thundering through our communities; our service to London would be improved and sure, we also get a service to East London for all those trips to Dalston Junction...

A win win for all.