Petra Ecclestone has spoken of her relief over moving to Los Angeles as a soaring crime rate meant she did not feel safe walking around Chelsea.
The heiress said other mothers in the playground expressed similar worries, and that stress about violent crime has dogged her recently.
She told the Sunday Times Magazine: "It's crazy how unsafe the UK has become — so much more so than 10 years ago."
"Talking with mums at school, there have been so many incidents, so many attacks, robberies, knives during the day. You don't feel safe walking around the neighbourhood."
The socialite plans to shortly move into her 57,000ft LA mansion – the largest house in Los Angeles county – and said she believes she will enjoy an easier life across the pond.
She said: "There is valet parking for the kids and the teachers come and get them from the car," and that in London she "wouldn't be able to have the same life that I did in the past " after her divorce last year with businessman James Stunt.