West Norfolk’s best-known royal watcher had a special and poignant wish as she cut her Birthday cake, writes RICHARD PARR. Mary Relph, of Shouldham, celebrated her 90th birthday with a fervent hope that King Charles would come through his current cancer treatment with a successful outcome. She has followed the Royal Family since she was a schoolgirl and was taken by her mother to the Sandringham Flower Show. At her party, she was joined by fellow Royal enthusiast, Sheila Clark who lives in Glasgow and Mary Lowlamd ofStowmarket. Both Mary and Sheila chatted about their Royal interests with some…