Nothing personally as its just that little bit outside my area.
The BGS website should give you an idea of what may exists
(apart from the fact the map search appears to be broken at the moment)
http://www.bgs.ac.uk/nocomico/choose_search.htm Text search comes back with the following
Catalogue No
Mine Name
Plan Location
Scan Location
From my memories of getting stuff before "SP" are Sections and "OM" are plans
SP2191
DERWENT MINE:GRINDSTONE CLEUGH
BGS EDINBURGH
BGS EDINBURGH
OM1764
DERWENT, CRAIG, EASTER, ELLEN, JEFFRIES, JEMMYS, MACDONNELL, REEDS, ROBINSONS, RUTH, SOD, TAYLOR, WESTGARTH, WHITEHEAPS, WHITSUN
DURHAM RECORDS OFFICE, DURHAM
COAL AUTHORITY
OM1764A
DERWENT, DAY, FELLGROVE, GIN-IN-THE-WOOD, SHILDON NORTHUMBERLAND RECORDS OFFICE, NEWCASTLE UPON TYNE
COAL AUTHORITY
OM2728
HEALEYFIELD, DERWENT, FORSTERS, GILL, SPOTESWOOD, WEST
DURHAM RECORDS OFFICE, DURHAM
COAL AUTHORITY
SP2194
WHITEHEAPS
BGS EDINBURGH
BGS EDINBURGH
SP2156
WHITEHEAPS
BGS EDINBURGH
BGS EDINBURGH
SP2192 WHITEHEAPS
BGS EDINBURGH
BGS EDINBURGH
SP2088 WHITEHEAPS
BGS EDINBURGH
BGS EDINBURGH
SP2193 WHITEHEAPS
BGS EDINBURGH
BGS EDINBURGH
OM11393
HUNSTANWORTH, BURNHEAD, CRAIG, FERNEY GILL, POWER HOUSE, WHITEHEAPS
DURHAM RECORDS OFFICE, DURHAM
COAL AUTHORITY