By Matt Roper The legendary cast of Dad’s Army have been regular guests in millions of living rooms over the decades. But for one family, Captain Mainwaring and his men were literally sitting on their sofa most weekends. The much-loved sitcom has been the subject of much reminiscing this week following the death of Ian Lavender, who played mummy’s boy Private Pike in the hit long-running series, and who poignantly was the last of the main characters to pass away. But for Nick and Penny Croft, the son and daughter of Dad’s Army writer David Croft, the memories are even closer – and the feeling …