“And I was doing The Voice UK then, I was one of the coaches… so any time I would have between filming I would give to Giles.
“So it was like four hours a day we spent on it for most of last year.
“And he had written a book about Rod Stewart, he had written Rod Stewart’s autobiography. And I said, ‘How long did Rod give you?’
“He said, ‘He’d give me two hours a day,’ so I said, ‘Well, I want four hours a day!’”
Sir Tom said this with a laugh and a smile, so there was a wry joke included, however it may be this competitive edge between the pair is an example of a rivalry.
source: express.co.uk