DME in the Hunters in 1956 was used for "Broadcast Control" interceptions when the close control frequency was jammed. For exercise purposes jamming was achieved by an open mike in the engine nacelle of a Lincoln thus making the GCI's instructions unreadable. A very high powered ground transmitter broadcast the target position. However as adjacent aircraft were still able to communicate one of a pair would tune in to a dme station eg Manston, and the other to somewhere else eg Tangmere. The lead called "Hayrake" and his wingman gave the distance. By using a cunning plotting device called the Wilson computer strapped to ones leg the two ranges could then be resolved as a fix and an intercept could be made on the estimated position of the target. It sounds simple but it finally relied on a visual intercept.
Another bit of kit fitted to Meteor F8s was Appendix which enabled homing on a jammer's transmission. Two needles crossed in the centre when you were flying directly towards or away from the target. To establish if it was higher or lower you did the first 90 degress of a slow roll and held it as long as possible when the instrument should indicate left or right, but in this case up or down. I can't remember if it was ever in Hunters.
Oh, the fun and games we day fighter pilots had in those days.