Commissario
I'm further down the map from you, but I hop on the m3 and drive to Richmond. And tube in from there, parking costs are not too bad. If you have the parking app, you can top up your parking, if you think you will be late back.That's a fair point, I won't be on 2 wheels, so will be subjected to all that!
Calne in Wiltshire, so will likely be jumping on the M4 at junction 16.
Again, another good point - it's just a check up before they book in the operation [whenever], so I might need a while to allow for anything they do to clear...