Hi Clare,
I can recommend a very good garage that I use for the Panda, the 156 and, when it's due, the Giulietta, but it's a bit of a drive. It might depend on whereabouts in Mancland you live, but we go to:
http://www.heathroadgarage.co.uk/
We live in Tameside to the east of the city but find the drive well worth while. I Generally have things done when one of us is on a day off, leave just after rush hour, say about 9.30 and usually get there about 10.15. We then walk into Sandbach which is about 10 minutes away and there are plenty of coffee shops, one Italian and run by Italians, restaurants, again an Italian run by Italians and pubs to have a brew or a bite to eat in. There's also a market on Thursdays, Fridays and Saturdays.
If you're the sort of person who likes to get a service or MOT done in as short a time as possible, or alternatively can't get time off in the week, this might not be the most convenient place for you, but it's run by a good egg called Alfie (Alfredo) Martone who is not only Italian, but apprenticed and worked for some years at Mangoletsi the FIAT/Alfa dealer near Knutsford.
It's a well equipped garage with four ramps, a pit and a diagnostic bay so he can deal with most issues you'll have (he hasn't had any problems with our cars anyway) but it's also small enough that he can keep an eye on everything that's going on. I'm also pretty sure he does all the test drives after work has been done as well so the boss has to ok all work carried out.
If I don't get a discount after this there'll be trouble......
Hope this helps. Oh, he's also on the Good Garage guide on Alfaowner as well.