Yes indeed.. He was training to be a psychiatrist. He is not a practicing doctor. He is also an ex T2D, and went into remission after following a 5:2 diet plan himself
However, he has a diet plan of his own that he is trying to sell and get the medical profession to accept and recommend to their patients, so he needs to stay on the Low Calorie Low Fat pathway as a line of least resistance. As we know from comments on this site, NHS HCP's are generally anti LCHF diets
Interesting who sponsors DUK (the other one) which is important since they are the official recognised body representing diabetes care in the UK
https://www.diabetes.org.uk/get_involved/corporate/acknowledgements/partners
And the British Nutrition Foundation, the other body that represents nutitionists
https://www.nutrition.org.uk/our-work/support-what-we-do/corporate-partnerships/current-members/
In 2010 their sponsorship was noted as:-
"However, the organisation's 39 members, which contribute to its funding, include – beside the Government, the EU –
Cadbury, Kellogg's, Northern Foods, McDonald's, PizzaExpress, the main supermarket chains except Tesco, and producer bodies such as the Potato Council."
Note the BNF also has a partnership with the British Vegan society.
(Edited to remove cat typing)