Aggy - is that 20 minutes alone or with help?
Alone i have a mile safety zone which is a bit crap but with someone, so far i went as far as Cambridge shopping with my mum and that is about an hour or just over and i went to Clacton last year and thats about an hour away too!
I went to Heathrow to collect a friend from the airport and that took about 2 hours, but i'd taken a travel sick pill to make me sleepy, just as well really, we were stuck in traffic for 80% of the journey!!!!!!!!!