There's less than three weeks to go before Sophie Anderton prepares to run the Virgin London Marathon.
However, the model couldn't resist a cheeky cigarette following a hard day at the gym on Tuesday.
The former Gossard pin-up, 35, tweeted of her embarrassment after she spotted a paparazzo capturing evidence of her unhealthy slip-up.
However, after a long workout, Sophie enjoyed a little puff off a friend's cigarette as they went to a pub in London.
After realising she had been caught with a fag in her mouth, she tweeted: 'Just been caught leaving the gym by the paps.
Sophie is hoping to raise £10,000 for her chosen charity The Children's Trust Tadworth later this month.
It will mark the second time she's done the run - she previously completed her first London Marathon in five hours and 49 minutes in 2006.
Last month, she spent time at Revival Bootcamp and has slimmed down from a size 8 to a size four.
However, the 5ft 9in model says she has also gained weight in muscle.
She tweeted on March 29: 'Well a successful week at bootcamp! Am now 33-24-35 and have put on muscle mass and lost body fat so v happy! @revivalbootcamp lost 5 inches.
'I have dropped from a size 8 to 4 but weigh 9st 8lbs.'
However, the model couldn't resist a cheeky cigarette following a hard day at the gym on Tuesday.
The former Gossard pin-up, 35, tweeted of her embarrassment after she spotted a paparazzo capturing evidence of her unhealthy slip-up.
Busted! Sophie Anderton enjoys a cheeky cigarette after her gym session in London on Tuesday
Sophie has technically given up smoking and has been on a major health kick while training for the 26 mile run on April 21.
Oops: Sophie tweeted of her embarrassment after being caught in the act
However, after a long workout, Sophie enjoyed a little puff off a friend's cigarette as they went to a pub in London.
After realising she had been caught with a fag in her mouth, she tweeted: 'Just been caught leaving the gym by the paps.
Fighting fit: The 35-year-old has been training hard for the Virgin London Marathon later this month
'The worst part I nicked a cigarette off my girlfriend! Argh!!!! I don't ever buy them as given up .so busted!'
I've given up! Sophie claims to have borrowed a friend's cigarette
Sophie is hoping to raise £10,000 for her chosen charity The Children's Trust Tadworth later this month.
It will mark the second time she's done the run - she previously completed her first London Marathon in five hours and 49 minutes in 2006.
Not long to go: Sophie has less than three weeks before she runs 26 miles
However, this year, she is aiming for 4 hours and 45 minutes.Last month, she spent time at Revival Bootcamp and has slimmed down from a size 8 to a size four.
However, the 5ft 9in model says she has also gained weight in muscle.
She tweeted on March 29: 'Well a successful week at bootcamp! Am now 33-24-35 and have put on muscle mass and lost body fat so v happy! @revivalbootcamp lost 5 inches.
'I have dropped from a size 8 to 4 but weigh 9st 8lbs.'
Slimmed down: Sophie recently dropped two dress sizes at boot camp