By Paul Martin Noiya Sharabi would have had no idea that the purple headband she cheerfully wore on her 16th birthday would become a precious keepsake for her grandparents. Six days after the party, Hamas terrorists murdered Noiya, her sister Yahel, who had just turned 13, and their mother Lianne. The three were among 1,139 killed in Israel on October 7 last year. Now, exactly six months later, Lianne’s British parents say they will never get over the horror. And they still have no idea if their adored son-in-law Eli is alive as he was one of the 254 people taken to Gaza as hostages. At their …