He said: “Thank you so much for all your messages, I’m fine. But it means obviously I’m isolating and I can’t finish the McFly tour.
“I’m so sorry, I’m so gutted. It hurts so much letting you guys down, you have no idea. But the shows are going on.”
Speaking about his Strictly appearance, he said: “This also means I have to have a week off from Strictly, so I won’t be there for week two.
“So I’m sorry to all of the Strictly team and to all my fellow contestants, and to my brilliant partner Amy.
“Sending you loads of love Amy. I will be watching on Saturday cheering you all on guys, I can’t wait to see your week two dances.