The Tango routes currently still both require and need HF comms, so HF is the answer.
Changes in the SE corner are in the pipeline, so will change going forward but not not current practice....
Sorry to see you gone Kcockayne! Happy retirement if you’ve escaped!
Used to listen to Shannon & Prestwick OCA in the 60s (before the combination as "Shanwick"). Continued listening throughout the intervening years up to 2010. Was at Prestwick as a Cadet in 1975/6. ATCO at Aberdeen 76 to 78. Initial escape to Jersey in '78 (there for 31 years-can it really have been that long ?!). Did a year at Coventry in 2007/8. Final escape in '08 now retired &, surprisingly, not missing it ! Thanks for your good wishes.