HOW TO BID THIS YEAR The auction is online only for 2020. To bid you need to register at either of the sites hosting the auction. https://www.easyliveauction.com/
This handwritten letter from Norman Rossington is being sold together with an invitation to the Save The Children Fund event mentioned in the correspondence.
Norman appeared in A Hard Day's Night with the Beatles in 1964. The TV show referred to in the letter is Curry & Chips which starred Spike Milligan and Eric Sykes.