James Martin, 52, shows off his 3st weight loss - but insists he did it WITHOUT the gym - as he steps out with personal trainer girlfriend Kim Johnson, 38, for stroll in London

James Martin showed off his weight-loss as she was snapped out and about with his girlfriend, personal trainer Kim Johnson in London.

The TV chef, 52, enjoyed a Sunday afternoon stroll in the sunny city, looking slim after he praised his game-changing but 'simple' diet that made him lose three stone recently.

James appeared relaxed on his daily outing with the fitness expert, sporting navy jacket and trousers with a baby blue shirt.

Meanwhile Kim, 38, flashed his flat midriff rocking a crop white shirt and fitting denim.

Despite keeping a low profile following his split from his girlfriend of 12 years, Louise Davies, James has been enjoying a slew of dates with Kim - and the pair were captured looking as loved-up as ever during a stroll in April. 

The pair packed on the PDA and weren't afraid who saw them with their arms around eachother,. 

The fresh couple were first spotted looking at jewellery store in Tiffany's in London's Old Bond Street back in April, which first led to their relationship coming to light. 

James split from his long-term love Louise Davies in December following a 12-year romance.

Kim was previously married to Elizabeth Hurley's ex-husband Arun Nayar, 59, but they went their separate ways in 2017. 

Arun and Elizabeth were previously married for four years, splitting in 2011. 

He and Kim first got together after the split and went on to tie the knot in July 2016, but then divorced the following year. 

Kim's official Instagram handle is @kimjohnson.pt and her name is still Kim Nayar in her bio. 

She has now set her account as private but had it verified in January after her old account was hacked. 

But it doesn't look like James and Kim couple will be tying the knot anytime soon. 

Speaking to the Sunday People in 2019, James revealed why he is not interested in marriage. 

He said: 'No, it doesn't interest me in the slightest, mainly because I've catered for so many weddings, really.

'I admire people who do it, that's fine, but I'm quite happy. I don't need to spend 60 grand on a day, no, I'm more than happy thanks.'

No doubt James is pleased to have some good fortune in his life after a turbulent few year. 

In December, James quietly split from his long-term Louise. 

The chef and the TV producer, 47, first began dating in 2011 after they met on the set of Celebrity Who Wants To Be A Millionaire? 

The couple lived together in a mansion in Hampshire during their relationship.

A spokesperson for James confirmed they parted ways in December 2023 and remain firm friends.

While recently opening up about his recent nutrition journey that radically changed his lifestyle, spilling what's the simple 'secret' ingredient to it.

The Saturday Kitchen alum explained how he eats fish twice a day as he discussed the 'game-changing' regime.

He told told The Birmingham Live: 'Losing weight is a balance of everything, it's getting off your arse and doing more and not eating less, but eating a variety of different things. Water is the key.'

'As you get older, I realised I don't need to go to the gym, I'm working [in the kitchen] all the time anyway.

'Water keeps your brain healthy and it keeps your skin healthy and it keeps you focused it's crazy when you give up soft drinks how much more your brain feels alive, it's very weird.' 

'What could be simpler than pan-frying a little bit of salmon and serving it with some great new potatoes and seasonal veg?,' James added.