I'm putting it down to the cold and not running the car for 3 days, and it's been minus temperatures and snowing here. I started it up tonight and it wouldn't fast idle so I had to keep my foot on the throttle for a minute or so. Then, once it 'caught' idle it fluctuated a little bit, just a few rpms +/-10 or so. With my old Honda we used to call it hunting or an air bubble in the coolant system. I've noticed it's thrown some more coolant (not much but enough to notice) out so I'll top that up a little in the morning. No overheating though and it runs fine after 3-5 minutes (even before it hits 90C). I did give it a little boot coming onto an A road from 30mph to 70mph and it didn't seem as pokey as the last time I drove it. Took it for a 10 mile drive and it was fine but the lumpy-ish idle is a concern. Is it just the coolant and a slight air lock? I'll run it with the coolant cap off for a few minutes to see if that releases any air. Need to drive to Scotland tomorrow so I'm just checking with you guys first.