He may be the enigmatic figure at the centre of the controversy surrounding Peter Mandelson, George Osborne and Oleg Deripaska.
But according to his former mother-in-law, Nat Rothschild is just ‘a very naughty boy’.
Elizabeth Neilson used the unflattering phrase as she remembered the ‘crazy’ life her model daughter Annabelle was sucked into after she met Rothschild on a beach in Bali in 1995.
The pair were married for about two years, divorcing in 1998.
Split: Nat Rothschild and, right, his former wife Annabelle Neilson
The short-lived marriage, which it is understood Annabelle ended, was turbulent from the outset, with reports that the pair moved with a fast crowd of heavy drinkers and drug users in New York and London.
Mrs Neilson also made it plain yesterday that neither she nor any memberof her family wanted to have anything to do with Nat Rothschild or his family again.
Speaking from her £3million home in Chelsea, West London, she said: ‘Nat’s a very naughty boy. He always was when he was younger.
‘My daughter hasn’t seen him for five or six years. We don’t have anything to do with the Rothschilds any more – and we don’t want anything to do with the Rothschilds.’