Nick. Found two of the Johnny Kidd & The Pirates gigs from June 66 in The North Berks Herald. The dates you have are slightly off. I can send pics.
Friday, 17 June at the Victoria Cross Gallery in Wantage
Sunday 19 June in Plaza Ballroom, Newbury
Pretty sure the Walton on the Naze was the Albion Hotel but will check
Also Bobby Hebb gig at the Palais de Danse in Leicester on 13 Dec 66 according to Leicester Mercury