By Zara Woodcock Louis Walsh vowed to be a ‘better person’ after being diagnosed and recovering from a rare form of blood cancer called Waldenstrom macroglobulinaemia. While on Celebrity Big Brother, the 71-year-old music manager said he was recovering from a rare cancer, adding that it had been a “reality check”. Louis made the admission during a chat with housemates Levi Roots and Ekin-Su Cülcüloğlu. Asked about his experiences in lockdown, he replied: “I was sick, and I think nobody knew I was sick. I had cancer – a mild version, a rare one, in my blood. “I didn’t even know I had it until I…