Countisbury was a relay of Mendip, but since 9th September 2014 the BBC A and B feeds are via BT fibre, following years of RBL problems. Pre B700 allocations: 59/50/55.
Originally the analogue allocations were 39/56/49/67 but these were changed in 1998 when interim DTT started on 56 & 67 from Wenvoe.