G-ONTV is a Castle Air machine as UKP25 pointed out, and caused the CAA particular interest when imported because it has an 250-C20R/4 engine and the CAA only have C20B and C20J models in their observer's pocket book of JetRangers..... As I recall, there was a delay of about 9 months to get a CofA!
Daifly - The bearded man of north Devon hasn't had a JetRanger since switching to an AS350 in 1984 and currently flies an A109 Power G-VMCO (his latest venture being the Video Meeting COmpany). Although of course he has had involvement in JetRanger ops with Mr Blobby et al in more recent years but he has never had an AOC, always subcontracted to an AOC operator.