I was quoted £1000 for private manometry and pH monitoring
So I had it done on the NHS - GI surgeon referred me for it. I would recommend asking questions of the technicians beforehand though as my NHS one was pretty basic, no buttons to press, not even asked to write down what my activities were!
GERD (3 years and counting)
Lifelong stuff: Food allergies/intolerance, eczema, asthma