Well, if you're stuck with a 9 hour layover in Manchester - do not despair - there is plenty to do and see.
Hop on the train from the airport to Piccadilly station in the city centre (15 min ride, 5 trains an hour - cost is £2.65 return). Piccadilly is within walking distance of most city centre attractions, or you can use the Metrolink tram which runs through the city centre from Piccadilly.
You may find Manchester very quiet on a Sunday morning, as most shops/museums etc won't open until 10am and then only the major shops will be open, but that'll make it more pleasant for a jet lagged visitor!! See ww.visitmanchester.com for ideas of what to do. I like Manchester - it's got a lot going on and is a fun place to visit.
I'd go to Urbis - Museum of the City (see
www.urbis.org) and the Art Gallery (see
www.manchestergalleries.org), with a lunch stop in between - good places to eat around Cathedral Square/St Annes Square.
If you're in need of recuperation, some hotels do a 'day rate', where you can use a room and facilities for a day - the Radisson SAS at the airport has a great pool/spa and excellent rooms - they'll let you in for £65 (ouch) - other hotels may be cheaper.
Otherwise, you could get the train from Piccadilly to Edinburgh (four hours via Leeds or York)!
Chris