Hi Cyberdad,
I am inspired by your hard work and dedication to a healthy lifestyle and cycling. I weigh about 22 stone and decided "it's time to get that bike out of the garage". My bike is a
Halfords' Apollo Frenzy Mountain bike, it had plenty of dust on it and the tyres were as flat as pancakes. I gave it a good clean, pumped up the tyres and started to cycle around the block where I live (near Romford, Essex). The first evening (last week) was just for 10 minutes, then the next day I cycled 15 mins and tonight I managed 30 minutes. I know that it isn't a great distance, but I am trying to slowly adjust to cycling. I have a free lesson (via my local council) tomorrow evening so that I can gain confidence on the road, then hopefully I will be about to cycle to work eventually (about 9 miles). I read the threads to your post and I noticed the advice regarding slick tyres. I will do that to see if it helps cycling on the road.
Good luck!