Seeking new work she auditioned for the Bernard Delfont Organisation, which was responsible for a number of big summer resort shows and touring productions.
George Bernard Shaw | Bernard of Clairvaux | Bernard Montgomery, 1st Viscount Montgomery of Alamein | Bernard Madoff | Bernard-Henri Lévy | Bernard Haitink | Bernard Berenson | Bernard Hopkins | Bernard Cornwell | St. Bernard | Bernard Montgomery | Bernard Herrmann | Bernard | Bernard Malamud | Bernard Baruch | Bernard Kouchner | Bernard Hinault | Bernard Comrie | Bernard Price Institute for Palaeontological Research | Bernard Edwards | Bernard Devauchelle | Bernard Tschumi | Bernard Maybeck | Bernard Lonergan | Jean-Bernard Pommier | Émile Bernard | Bernard Tapie | Bernard Cribbins | Bernard Bertossa | Tristan Bernard |
He worked for Bernard Delfont's London Management company, with responsibility for stars including Morecambe and Wise, until 1987 when he formed his own company Billy Marsh Associates, which survives him.
In December 2008 Marsh was the subject of the BBC Radio 4 programme Great Lives, nominated by Michael Grade, the nephew of his long-time employer Bernard Delfont.