And on the TWU's Hunters?
Unless senility has well and truly arrived, my memory is that this was the only navaid fitted to the Mk 6 Hunters at Chivenor on 229 OCU and subsequently on the 6A Hunters at TWU Brawdy One could indeed fly a reasonably respectable instrument recovery but first of all you had to find the overhead! The FGA9 also had ADF but it was hardly at the top of the reliability pile and at Brawdy rarely worked.
With the Eureka system one of the big limitations was the paucity of ground stations.