Friends from a swimming club are about to embark on the challenge of a lifetime by swimming the English Channel. The challenge is the idea of Danni Rulton, 26, a senior captain at Halstead Swimming Club, who wants to raise money and awareness of the charity Child Bereavement UK. Danni, a physiotherapist at Ipswich Hospital, lost her mum when she was only 15 and knows how important support for children can be. Danni said: “Mum died after what started as a blood clot. The main feeling ws one of isolation. I remember feeling like no-one understands. “People say they are sorry, but it is difficult…