The weather has been decidedly 'iffy' of late up here and many of the crags are saturated inside which means even a little rain knocks them out of condition and vulnerable. TBH I wouldn't recommend traveling up here in Jan/Feb as you with a bit of rain could be disappointed, or, end up feeling pressured to climb (by the journey) when stuff looks ok, but isn't.
Climbing in the County is possible at this time of year, and folks are getting out, but they are mostly locals taking advantage of weather windows, going to the right places and trying the right climbs/problems. (Mostly...)
There is a Northumbrian Weather and Conditions FB page you can join which you might find useful.
Thanks for the info Steve, much appreciated. Had a look at the FB page and it doesn't look promising at the moment. I'll keep looking and make a decision when the conditions are better and the rock can take a bit of rain and still dry out.