When issues with the trains, she could take the buss to South Wimbledon and northern line home to Clapham South.

You could also consider Wandsworth common if easier/safer for her to walk there. The Wimbledon trains are quite frequent from CJ.
It’s a bit more faff, but an option to keen in mind.
Especially for coming home and she wants to walk or even pick up is more convenient.

Good luck!

Ps forget the local buss option, would take over an hour.

Ah, thank you HenryHoover, this is hugely helpful!

From BTC your daughter would probably get the train from CJ. Plenty of girls on the platform every day with Wimbledon High uniforms. She would find her travel companions very quickly I would think.

Hi all.
Wimbledon High is firmly on my daughter's and my shortlist for secondary schools, but I've discovered that they don't run a school bus. We live between the commons, just off Thurleigh Road. Can anyone from a similar locale share any insight on how easy it is to get to school at Wimbledon High, perhaps on the public buses - or perhaps there is or might be a school bus after all?
Thanks everyone.