I parked close to a white Mii in Lidl car park the other day (cheapskate...). As I was at the checkout I could see the driver looking round my Up, unfortunately he was gone before I got out or I would have pointed him in the direction of the forum.
They certainly are getting more popular round this way... I saw two today and three last week at almost the same time, all of which were different cars but mostly 5-door! One of those was on the motorway and he overtook me with ease (although I wasn't the one driving...)!
Edit: just seen my third of the day, another 5-door up in a lovely silver colour in Redbourn