Steve, the concert was sponsored by Southend-on-Sea Education Committee & featured the Southend Youth Orchestra, the Southend Boy's Choir, Southend Music School Brass Band & Recorder Ensemble, Southend Schools Music Association Choirs & the Southend Festival Chorus & Orchestra, so not a folk concert. The programme was built around Sibelius, Purcell, Bonsor, Williamson, Britten, Orff...& me! The principal conductor was Roy Wales who was, at the time, Director of Music to the Education Committee. To quote from the programme: "Tonight's concert is intended to reflect some of the musical activities in the County Borough sponsored by the Education Committee..." There were around 750 participants. One positive, the concert was recorded. I have a copy, making transcription an option, but the quality, particularly how the voices have been recorded, lacks definition so portions of the lyrics are indecipherable. I'm embarrassed to admit that I can't remember all the words, despite having written them!
       medievallassie, you have been very useful to the thread. I'm wondering whether, rather than an advert, I contact the local papers & see if they would run a story: "Composer seeks missing Music" type of thing. They might just go for it.
      Thank you, both,
                                 Nigel.