However, it was his gushing words for ex Cath, who he dated way back in the 1990s, that grabbed our attention.
Could it be the former Blue Peter presenter still holds a candle
"She was stunning. The most beautiful woman I've ever seen. There was nothing to compare to her," says John of his first meeting with the now Mrs Michael Douglas.
"We talked and there was a lot of yin and yang and mutual attraction."
He also reveals that the cheeky Welsh lass, who wasn't at that stage the massive star she is now, answered his request for a date by saying "call my agent".
When asked if Catherine was "the one", John confesses: "Everyone thinks she was.
"I certainly miss being in love with someone," he adds.
Catherine was, John says, "very supportive" during his recent turmoils, as was hubby Michael who John claims "hates the British press as well".
As for his other famous ex-girlfriend, Abi Titmuss, John is less generous with the compliments.
"I don't think Celebrity Love Island was a good idea," he says of her career post-John. "But up to that she was playing a good set of cards."
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