In the late 70s and early 80s, the BBC had a series of programmes called ‘Sight and Sound In Concert’. These specially filmed gigs were simultaneously broadcast on BBC TV and radio. A few are available commercially – as is the case with the excellent Thin Lizzy performance from the Hitchin Regal in 1983 – but sadly, many are not. Thankfully, due to repeat showings, many fans have pristine off-airs of shows by Camel, Gentle Giant, Renaissance and others.