Where to Park outside london for 72hrs??

[21ZIGGY]

I need to get to london on a train strike day from cheshire. Is anyone familiar with anywhere i could drive and park for 3 days then could get on a tube into central london?
I have zero knowledge of london! I would be coming down M1 by Watford i think
Thanks!

Stanmore and Canons park on jubilee line have large car parks. Very short drive between if one was busy. There is free on street parking on side streets but likely to be hit and miss

I tend to park at Stanmore tube station. I did a 3 day training course and left it there for 3 days. Just off the M1

Thanks both ill look them up!

Book a space through ParkBee or a similar set up. They are usually residential and so staying put for 3 days may not be as exposed as being in a car park without moving. Need an advance booking for the whole period though.