You will be able to find a dietitian within the NHS after being referred by your GP Practice, or multi-disciplinary team. Your GP may make this referral or you may request a referral yourself. Why not contact the Dietetic Department at your local hospital to enquire whether they operate a ‘self-referral’ system. Consultations with dietitians within the NHS are free.
Alternatively, if you wish to see a dietitian who practises privately, you can search online for a dietitian near you on the Freelance Dietitians website, which is run by the BDA's Freelance Dietitian Group.