When ascending, you can just take the approach that 'power gives way to sail' and ignore them, ride up the middle of the road on the tight bits and expect them to wait for you - of course when it's one of the wider straight bits you pull to the side so they can get past.
After all, isn't this just what Cyclecraft recommends, taking primary when it's not safe for them to overtake ?
One of my favourite bits on this year's FWC was the smell of clutch and wheelspinning rubber from the fake-blonde driving the BMW M3 up Hardknott.
There were so many cyclists ascending, some riding, some pushing, that she was forced to wait and then pick her way through when she could
400bhp or whatever it's got was not ideal for the task...there was a Fiat Punto up next with far less drama
And I enjoyed passing one of the support motorbikes going down the other side - he was on a big, heavy BMW tourer with big panniers on and it looked seriously unwieldy, a real handful : he saw me coming in his mirrors, moved very-obviously out of the way and on a light and nippy roadbike, I just whizzed-by.