Before the Dominie was introduced (circa 1966?), we trainee navs were given a dozen or so trips in Meteor NF14s to get us used to going faster than a Varsity. One of those trips was at low level, but we still planned it like any other sortie, preparing a flight plan using our Dalton computers. By the time I did the Nav Refresher course in 1971, they'd set up the low level squadron at Finningley, using the JP4. I actually did that course three times in 1971/72 ; once on the Nav Refresher, once on the Phantom Lead-In Course (from which we were sent home and re-posted when the F4 fleet had Spey engine problems), and once on the Buccaneer Lead-in. The JP flying was great fun, and we were taught proper LL pilot navigation. 420 knots in the Bucc was still a bit of a shock initially after the JP's 240 knots!
-- Tim L