I remember the concert Tunesmith refers to. September 1963. In fact it wasn't Hope Hall, which by then had become The Everyman Cinema.

I caught the show at the Phoenix cinema in Wallasey Village, which was owned by the same bloke who owned the Everyman. Apart from Clifton, there was the trio with Martin Carthy, except they were down to two. MC and a rather buxom lass in a black dress. They were indeed called the Thamesiders. The other act that night was Jacqueline and Bridie.