There is a website devoted to recording evidence of the "Auxiliary Units" formed in World War 2, and a section dealing with Northumberland.
http://www.coleshillhouse.com/acklin...liary-unit.php
There was an Acklington cell based on Chevington Woods and some of its members were: Len Crackett, Jimmy Jobson, Harry Moscrop, JT Dalby, R Scott, TG Simpson, AE Smith.
Apparently these resistance groups were primarily set up on the east coast and the north east England one was, for a time, led by the actor Anthony Quayle.
The Evening Chronicle did an article on them way back in 1968 and the Northumbrian magazine has done some articles recently.