In the mid 1970s, Joanna/Melanie was the support for a UK tour of Loudon Wainwright III. Something tells me this was at the time that Bell records had recently signed Loudon.
I clearly remember a concert from that tour at Oxford Polytechnic which. at the time, was experiencing a student 'sit-in', a quaint expression, as a protest against increased accommodation fees at the halls of residence. After the show, Mel came into the occupied admin block to perform a couple of songs for the benefit of those occupying it and who'd clearly missed the concert. Loudon, perhaps not surprisingly, declined to attend. Mind you, he'd got rattled on stage earlier when performing "Be quiet, there's a baby in the house" and had failed to quiesce the audience sufficiently... A teensy primadonna that night. As an aside, I learnt that night that Mel's parents ran a hotel in Truro at the time.
Still enjoy listening to Blue Angel, available from http://www.amazon.co.uk/Blue-Angel-Melanie-Harrold/dp/B000056096/ref=ntt_mus_ep_dpp_1 even now!