With its knobbly knees contests, morning exercise calls and iconic 'Morning campers!' greeting, Hi-de-Hi was the BBC sitcom adored by Brit households in the 1980s. At its peak, the show enjoyed an audience of up to 15.5 million viewers – nearly double that of a modern-day Strictly Come Dancing final. Among the Yellowcoats working at the fictional Maplins holiday camp during the fading glamour of the 1950s were Spike (Jeffrey Holland), Sylvia (Nikki Kelly) and their formidable manager Gladys (