By the miners' strike of 1974 and the resulting three-day week that limited the nation's consumption of electricity, Vincent was hosting a new style of show called 'Late Night London' and playing devil's advocate with listeners who called in by telephone to air their problems or opinions. The programme was broadcast late in the evening and was among the first to establish the format for the radio phone-in in the UK. His celebrity interviewees included prime minister Margaret Thatcher, "at her charming best", he says on his own website.