The GP or nurse may give you some forms for investigations. Most are done locally. Here are some useful details.
South Camden Centre for Health (at the side of Stephenson House),
146-162 Drummond Street,
Monday—Friday opening at 8:00 to 16:45 for walk-in patients
Royal London Hospital for Integrated Medicine
60 Great Ormond Street
London WC1N 3HR
08.30 to 16.30 daily Monday to Friday (closed for lunch 12.00 to 13.00)
Clinic G, 1st floor podium, UCLH, 235 Euston Road, London NW1 2BU.
The department is open 09:00-17:00 Monday to Friday – patients for walk in ECG should arrive before 16:45.