@audio-b-dog
I Want To See the Bright Lights Tonight and Pour Down Like Silver for earlier in their career. Shoot Out the Lights from later on. The duo tune in the link is from Pour Down, a record heavily influenced by their involvement with Sufism.
For R. on his own, try his Live From Austin Texas for a start. It’s half acoustic, half electric. Or, from the same tour: Semi Detached Mock Tudor. A nice all acoustic disc is Celtschmerz. He has quite a catalogue at this point. His most intense electric playing is live, for sure. And he is one hell of a guitar player.
As has been suggested, check out Fairport Convention. I’d suggest you start with Liege and Leaf. Full House is just the boys, without Denny.
Also Sandy Denny solo albums.
Steeleye Span is in a somewhat similar vein.
John Martyn is another very gifted British singer-songwriter. Try Bless the Weather, Solid Air, and for a jazzier flavor, One World.
Then there is Pentangle. The Pentangle, Sweet Child, Basket of Light.
And... Bert Jansch and John Renbourn, together and apart.
You might like LA Turnaround by Jansch.
The UK has produced so many incredible musical talents.
RT covering J. Mitchell at a J. Mitchell dedication show:
https://www.youtube.com/watch?v=h54rRq2SAv0&list=RDAJA2jFIRxp0&index=2