In the social media post, he said his plans might change if his dad’s condition takes a turn as he revealed “he’s not really there at the minute”.
However, he confirmed at the moment his dad is “steady” and “slowly but surely improving a bit”.
But admitted he will “really need some support” on his challenge.
“It’s going to be extra mad and extra emotional now, hopefully I can count on you to be there,” he said.
The presenter also thanked the doctors and nurses who have been helping his dad, and to those who have sent him messages of support, saying: “In times like these it’s so nice to feel the love from people.”
In the post, Greg said he wanted to share the personal update as “life isn’t plain sailing but we’ve got to carry on”.
He ended in the post by asking people to keep “big Al in your thoughts”.