The leg between Sheffield & Carlisle was booked to be operated by a DRS 20 & 37.QUOTE]
the DRS Cl 20 was not availble so it was a pair of 37's on the charter it was routed according to the spitfire railtours website however there is a more indepth route list on this link
http://www.railforums.co.uk/showthread.php?t=35046
(with 2 x DRS class 37) BIRMINGHAM INTERNATIONAL-Stechford-Proof House Jn-BIRMINGHAM NEW STREET -Grand Jn-Landor St Jn-Water Orton-TAMWORTH HIGH LEVEL-BURTON ON TRENT-Stenson Jn-DERBY-Clay Cross-CHESTERFIELD-Beighton Jn- Darnall-SHEFFIELD -Swinton Jn-South Kirkby Jn-Calder Bridge Jn-Altofts Jn-Engine Shed Jn-Armley Jn-Apperley Jn-Shipley-Keighley-Skipton-Hellifield-Settle Jn-Ribblehead-Blea Moor-Garsdale-Kirkby Stephen-Appleby-Culgaith Crossover-Petteril Bridge Jn-Carlisle London Road Jn-Carlisle (3 hour break)
THE RETURN ROUTE (with DRS class 66/4) Carlisle-London Road Jn-Brampton-Bardon Hill-Hexham-Wylam-Norwood Jn-NEWCASTLE (reverse 2 x DRS class 37 to work forward)-Low Fell-Durham-Darlington-Thirsk-Skelton Jn-Colton Jn-Church Fenton-Moorthorpe-Swinton-Meadowhall-SHEFFIELD-CHESTERFIELD-Clay Cross-DERBY-Stenson Jn-BURTON ON TRENT-TAMWORTH HIGH LEVEL-Water Orton-Landor St Jn-Grand Jn-BIRMINGHAM NEW STREET-Proof House Jn-Stechford-BIRMINGHAM INTERNATIONAL.
hope this helps i dont know which 37's were on it but im sure somone will know