Hi PD
Not sure how many of the wartime ranges were still open in the 1960’s but I do know that Lyme Bay was used by the TT20’s (sometimes shutting down 1 engine to save fuel during the positioning/return flight)(shutting down 1 engine was fairly common practice with Meteors).
I doubt the TT20’s had the range/endurance to use Aberporth – RAF Aircraft using Aberporth/Cardigan Bay Range usually operated out of Llanbedr or Valley.
I am also assuming that the Meteor T7’s (later Hunter GA11) were used during the Royal Navy ‘Thursday War’ wargames off the south coast – a role carried out by Hawks in more recent times.