Shoppers and staff at Tesco in Bishop’s Stortford were shocked when legendary rocker Sir Rod Stewart grabbed a wire basket and prowled the aisles in search of alcohol. He was scouring the shelves of the Bishop’s Park branch for Wolfie’s Whisky – his own brand of the hard stuff, named after his hell-raising days with the Faces. Rod the Mod and his 52-year-old wife, Lady Penny, who is a special constable with the City of London Police, were able to buy a bottle at their local store for the first time. The couple snapped up Durrington House, an 18th-century 10-bedroom mansion in Sheering, for £4….