I've got a bike

Just worked out a great shortcut to Richmond Park that doesn’t involve any major roads or (more importantly) going up Richmond Hill.
It means I end up in the lower part of the park – if I want to go to the high part I still have to go uphill at some point – but it’s a short steep (pushable) slope instead of a long slow slog.

I don’t mind hills usually, but I’ve not ridden for a while and just don’t have the energy – I’d be knackered and ready to go home before I even reached the park gates.

That’s one of the nice things about bikes, without the constraints of staying on roads; there’s always another way to where you want to go.