re the inside car protection argument - my girls and I were all 3 of us unwell before we got out of the car at the Rollrights Stones. As soon as we parked up actually. Parking is on road quite near. None of us felt unwell at Stonehenge. At Avebury only 2 felt unwell and one so unwell she could not walk the entire circle and we had to stop car when leaving past avenue of standing stones so she could be sick. We were all adults. So no kids getting car sick thing.

Eliza - I get a rising gullet feeling. Upper chest and throat feel full. Bit of nausea and sometimes bit of dull headache. Quite dramatic, because I typically sing in the car and suddenly I will stop, before I realise that I feel funky and before seeing a transformer substation. TheSilentOne (husband and driver) used to ask what's wrong. Now we both know why.

As an aside, does anyone know why some people cannot wear windup wrist watches? When I was 8 I received my first Timex. And as soon as I put it on it stopped keeping time. My Dad yelled it me. Thought I'd over wound it. I hadn't touched the winder. Took it off and it worked again. Put it on it stopped. This happened with about 4 different wind up watches from 8 to 30 years. Battery op watches tended to die quite quickly too. Don't bother with watches now. Use my phone for the time.