“There’s moments, if there’s an emotional scene in the programme I know those moments, I know those facial expressions, that touches somewhere deep inside me.”
Jez also credited his religion for helping him through his grief.
He added: “She’s in a different world, it’s a bit further away.
“It’s more distant but it doesn’t mean death is a defining end, it’s a transition and I’m intensely grateful that I’ve got that, we do move on to different lives and places.”
Leah also left behind two daughters, Lily and Maya Watson, from a previous relationship, who are now in their early 20s.
Express.co.uk has contacted Jez for comment.