I've had a go at writing my own CORE and its very difficult so I can appreciate the trouble it is to keep it running.
The most intensive problem is that the maps are provided as PDFs and require manual processing of nodes and vertices to calculate valid routes inside the individual maps. There are unfortunately over 100 maps to manually process.
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Here's what bob's core comes up with:
A routing points: [Routing Point LANCASTER GROUP]
B routing points: [Routing Point LONDON GROUP]
ROUTING Station LANCASTER TO Station LONDON EUSTON
10 routes found
route [Map NW, Map PS, Map MM]
Map NW to Map PS via [Routing Point STOCKPORT, Routing Point HAZEL GROVE, Routing Point MANCHESTER GROUP, Routing Point BOLTON, Routing Point GUIDE BRIDGE, Routing Point PRESTON LANCS, Routing Point WILMSLOW GROUP, Routing Point WIGAN GROUP]
Map PS to Map MM via [Routing Point NOTTINGHAM GROUP, Routing Point SHEFFIELD GROUP, Routing Point DERBY GROUP, Routing Point BARNSLEY, Routing Point DONCASTER, Routing Point CHESTERFIELD, Routing Point MEADOWHALL, Routing Point MELTON MOWBRAY, Routing Point OAKHAM, Routing Point LEICESTER, Routing Point LOUGHBOROUGH GROUP, Routing Point SWINTON S YORKS]
route [Map NC, Map PS, Map MM]
Map NC to Map PS via [Routing Point EARLESTOWN, Routing Point WARRINGTON GROUP, Routing Point HUYTON, Routing Point PRESTON LANCS, Routing Point CREWE, Routing Point HUNTS CROSS GROUP, Routing Point WIGAN GROUP]
Map PS to Map MM via [Routing Point NOTTINGHAM GROUP, Routing Point SHEFFIELD GROUP, Routing Point DERBY GROUP, Routing Point BARNSLEY, Routing Point DONCASTER, Routing Point CHESTERFIELD, Routing Point MEADOWHALL, Routing Point MELTON MOWBRAY, Routing Point OAKHAM, Routing Point LEICESTER, Routing Point LOUGHBOROUGH GROUP, Routing Point SWINTON S YORKS]
route [Map MM]
route [Map BS, Map GC]
Map BS to Map GC via [Routing Point BIRMINGHAM GROUP, Routing Point COVENTRY, Routing Point SMETHWICK GROUP]
route [Map LM]
route [Map NC, Map MH, Map LM]
Map NC to Map MH via [Routing Point BLACKBURN, Routing Point STOKE ON TRENT, Routing Point HELLIFIELD GROUP, Routing Point CREWE]
Map MH to Map LM via [Routing Point BLACKBURN, Routing Point STAFFORD GROUP, Routing Point STOCKPORT, Routing Point WILMSLOW GROUP, Routing Point CREWE, Routing Point HELLIFIELD GROUP, Routing Point MANCHESTER GROUP, Routing Point BOLTON, Routing Point STOKE ON TRENT]
route [Map LM, Map CS]
Map LM to Map CS via [Routing Point BLACKBURN, Routing Point WALSALL GROUP, Routing Point BIRMINGHAM GROUP, Routing Point BOLTON, Routing Point STOKE ON TRENT, Routing Point COVENTRY, Routing Point WILMSLOW GROUP, Routing Point SHREWSBURY, Routing Point WIGAN GROUP, Routing Point LONDON GROUP, Routing Point WOLVERHAMPTON, Routing Point WARRINGTON GROUP, Routing Point EARLESTOWN, Routing Point STOCKPORT, Routing Point MANCHESTER GROUP, Routing Point HUYTON, Routing Point LICHFIELD T V, Routing Point NUNEATON, Routing Point STAFFORD GROUP, Routing Point SMETHWICK GROUP, Routing Point PRESTON LANCS, Routing Point CREWE, Routing Point HELLIFIELD GROUP, Routing Point CLAPHAM JUNCTION, Routing Point TAMWORTH]
route [Map NC, Map EH, Map LM]
Map NC to Map EH via [Routing Point BLACKBURN, Routing Point HALIFAX GROUP, Routing Point EARLESTOWN, Routing Point WARRINGTON GROUP, Routing Point HUYTON, Routing Point HELLIFIELD GROUP, Routing Point HUNTS CROSS GROUP, Routing Point WIGAN GROUP]
Map EH to Map LM via [Routing Point BLACKBURN, Routing Point WARRINGTON GROUP, Routing Point EARLESTOWN, Routing Point HELLIFIELD GROUP, Routing Point BOLTON, Routing Point WIGAN GROUP, Routing Point HUYTON]
route [Map NC, Map CS]
Map NC to Map CS via [Routing Point BLACKBURN, Routing Point EARLESTOWN, Routing Point WARRINGTON GROUP, Routing Point RUNCORN GROUP, Routing Point HUYTON, Routing Point STOKE ON TRENT, Routing Point PRESTON LANCS, Routing Point HELLIFIELD GROUP, Routing Point CREWE, Routing Point HUNTS CROSS GROUP, Routing Point WIGAN GROUP]
route [Map BS, Map CS]
Map BS to Map CS via [Routing Point BLACKBURN, Routing Point WALSALL GROUP, Routing Point BIRMINGHAM GROUP, Routing Point BOLTON, Routing Point STOKE ON TRENT, Routing Point COVENTRY, Routing Point WILMSLOW GROUP, Routing Point SHREWSBURY, Routing Point WIGAN GROUP, Routing Point WOLVERHAMPTON, Routing Point STOCKPORT, Routing Point WARRINGTON GROUP, Routing Point EARLESTOWN, Routing Point MANCHESTER GROUP, Routing Point HUYTON, Routing Point LICHFIELD T V, Routing Point NUNEATON, Routing Point STAFFORD GROUP, Routing Point SMETHWICK GROUP, Routing Point PRESTON LANCS, Routing Point HELLIFIELD GROUP, Routing Point CREWE, Routing Point TAMWORTH]