Don't think the derailleur's bent as it hasn't been knocked or anything and this only happened after I got the tyres put on. I was there all the time so they didn't damage anything. When he put the back wheel on he didn't take into account the position of the shift lever in relevance to the gear the bike was in when I took it into the shop. He should have asked and I should have told him, but it didn't happen.

When I nipped up to the shop tonight, I put the bike in 2nd lowest gear (steep short uphill). She stayed in gear. On the way back I changed down a gear. I only touched the lever with my fingertip and she went down a couple of cogs so I've tightened the shift lever nut a bit and will try that tomorrow. Weather permitting son and me will be going for a run on the bikes so I'll try it out and see how she performs.

I've got until Tuesday before I use her to get to work again. It is a holiday on Monday here and hubby is taking me to work and picking me up as we are going out in the afternoon. If I can't get the gears working properly I'll use my son's bike (same as mine) to get to work on Tuesday then take my bike to the other bike shop which is less than a mile from my house and they'll adjust the gears properly.

On the plus side at least I know my fitness is improving after managing to get up the steep hill on the way home in 2nd highest gear (gasp, wheeze...)