Main changes since 2008 (mainly introduced in Dec 2008):
Bolton corrdor was different in 2000, with roughly...
-1tph Blackpool N-Manchester Airport (FNW, became TPE), running roughly as per current pattern with a couple of extra stops (e.g. Lostock)
-1tph Blackpool N-Buxton (FNW, became Northern), calling most stations
-1tph Windermere/Barrow (roughly alternating-Manchester Airport (FNW, became TPE), calling Chorley, Bolton only
-Occasional Virgin XC South Coast-Birmingham-Manchester-Bolton-Preston-Scptland services. Semi-regular during 2000, ramped up to two-hourly in 2002's Operation Princess
WCML Long Distance was also quite different - probably generally hourlyish from Euston-Preston, but extensions through to Lancaster, Carlisle and Glasgow much less frequent (less than hourly during the day). Virgin XC 'direct' from Brum (and South Coast/South West) perhaps every 1-2 hours as well (some VT services also going to/from Blackpool)