His further health complications include clots in his lungs and holes in his heart as well as now being diabetic.
The doting mum also opened up about the impact Derek’s illness has had on the couple’s children, daughter Darcey, 14 and son William, 11.
In a recent interview with The Sun, Kate explained her son now sleeps next to his dad’s empty bed each evening to feel close to him.
Speaking about Derek, she said: “It just doesn’t feel right without him. I know he would have loved this, our time together in lockdown.
“He was never happier than being in this house, just the four of us.”