In many parts of the country you can be referred to your local hospital dermatology department for assessment and treatment but some areas of the country this is not funded by the NHS. Some treatments such as Botox are not generally funded by the NHS so patients with hyperhidrosis will seek private treatment.
The links below offer some private options to search through:
The Consulting Room - hyperhidrosis & excessive sweating clinicsThe Consulting Room - miraDry clinicsSweathelp.org clinician finder