The new winter timetable starts this Sunday 15th December. There appears to be little change to Northern services along the Durham coast. TPE however introduce a completely new timetable with trains extended from Middlesbrough to Redcar Central. There are generally good connections at Thornaby for trains from Manchester into northbound coastline services but a wait of around 35 minutes going in the opposite direction.
Grand Central trains similarly show only changes by the odd minute with the exception of the first weekday departure from KX which now departs 21 minutes later Monday to Friday but 18 minutes earlier on Saturdays. No sign of the additional services yet.
However be aware of major changes to the Grand Central timetable most weekends during January and February because of East Coast mainline engineering work. In particular there are no GC trains at all over the weekends of 25-26 January or 29 February-1 March due to further blockades of Kings Cross station for track and signal remodelling.
Timetables can be accessed as follows
Northern No 2 (Durham Coast)
Grand Central (All services)
GC January Engineering alterations
TPE (Liverpool/Manchester to North East/Edinburgh