Plymouth closure
It's sad news. I think the rot set in way back when Brymon lost the Heathrow slots and were re-located to Gatwick. Newquay and Plymouth to London City should have been successful but the routing imposed by ATC to get them around the London TMA outbound and Gatwick inbound blew it because it added so much flight time.
I used the Newquay/Heathrow service a lot during the 70's using the Brymon HP Herald when I was working in Saudi Arabia. It was a fabulous connection with either the BA flights to Dhahran or the QANTAS flights to Bahrain. Flights were always popular because so many 'janners' were working in the Middle East at the time. The breakfast beer sessions at Terminal 1 LHR on arrival back from KSA were legendary.
So, farewell Plymouth. You were one of my stops when I did my first solo cross-country when learning to fly at Bodmin. Shedding a tear or two as I write.