I'd personally argue no, although that would fully contradict the entire idea of free universal healthcare. The NHS already has free diet plans and advice for those with obesity, anything extra is unnessasary in an age where the NHS is crumbling.
I'll be honest though if you haven't already done this project in saying that this question seems a bit sparse to do a project on, why not do a project on the NHS as a whole and include this. Unless you feel you can pull it off well, then go for it.