In message , Paul Cummins
writes

My fastest route to work, from Forest Hill to Tolworth,
was almost certainly Forest Hill - London Bridge - Waterloo - Tolworth.

This would need a zone 1-5 ticket.

By going from Forest Hill - East Croydon - Clapham - Tolworth, I saved
over £30 a month and only needed a zone 2-5 ticket.

Travelling via East Croydon is at least as fast as going via Waterloo
according to the TFL journey planner.

I suspect it is also the shorter route, since travelling via London
Bridge would take you much too far north - Tolworth is SW of Forest
Hill.

--
Paul Terry