You just can’t trust these thespians – any residual loyalty vanishes once the last cheque has been banked: according to the Evening Standard, Maureen Lippmann, who played the typical Jewish mother Beattie (BT, geddit? – we didn’t at the time, but then we detest brutal acronyms in place of meaningful names) to the mutual benefit of British Telecommunications Plc and her bank balance, when asked to reveal her favourite word, replied, without hesitation, Mercurial.