I can remember several concerts but not their order. Not a semi-century since!
Early ones for me were by Family, Led Zeppelin, Van der Graaf Generator (supported by Lindisfarne and Genesis!), Gong and Pink Floyd.
Of those five concerts I think Family was the first.
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Those were full theatre performances. Other than them:
My last years at school were well before British schools aped the American "Prom" idea, posh frocks and all, and down-graded from live music to mere discos. Mine had its "Valedictory Dance" on the last night of the Summer Term. We were entertained by a surprisingly eclectic range of bands, including in my time, Principal Edward's Magic Theatre (folk-rock), Demon Fuzz (heavy, funky jazz-rock) and Matching Mole. (This last name was a play on Soft Machine, and the combo played similarly un-danceable, avante-garde, progressive-rock. I don't know if there was a link between the two groups).
Demon Fuzz did well. They were delayed on their journey to the gig by a road accident that put their roadie in hospital; but still delivered the goods with the lead singer operating the sound mixer himself, on stage!
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In the late-60s / early 70s students in two local further-education colleges ran a series of charity fund-raising gigs in the town's ball-room. I attended a few I think, certainly one headlined by Juicy Lucy, but I forget who else played in these.
The headline acts in those were supported by local bands; the town having a thriving live-music scene which I think still continues, post-pestilence; though it's hard to tell. Our local paper ran a weekly page of many forthcoming gigs by local performers in many musical styles, mainly in pubs. No more: it and many other British local and regional newspapers were taken over by a once-UK firm called Newsquest, now owned by US-based Gannett, that replaced local event advertising with syndicated, pretentious advertising-features and inflated puzzle-pages.
We don't even have a music shop - i.e. one selling sheet-music, instruments, etc. - in the town any more....
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I saw a very pithy comment on the state of pop and rock now. It was a cartoon depicting a radio-station DJ saying, "That was Led Zeppelin, and guess what, kids - they played their own instruments!"