Improve tracing of motorways at Catthorpe M1/M6 junction.
Update carriageways and fix some node errors around M6/M6T/M42
Add carriageway_ref tags fo M56.
Add missing carriageway_ref tag.
Add carriageway_ref tags to northernmost stretch of M6.
Fix M60 J17 A carriageway junction.
Add carriageway_ref tags fo M57.
Add carriageway_ref tags fo M58.
Add carriageway_ref tags fo M66.
Add carriageway_ref tags fo M602
Add missing "B" carriageway_ref tags.
Move motorway_junction M25 J7 to junction node.
Capitalised ref, to match road sign.
Remove spurious ref on the motorway link.
Correct a carriageway_tag on the M42
Correct a carriageway_tags around Hatfield Tunnel, A1(M).
Correct a carriageway_tag on the M42