I went through hospital group and my surgery was in Bromsgrove, Birmingham.
Just checked the hospital group's website and they cover Glasgow with a clinic at the below address:
The Ingram House Clinic
227 Ingram Street
I found the the entire thing problem free and easy. I called the clinic, booked the consultation, met the surgeon, booked my surgery date, had a call from the dietitian to talk me through the pre op (LRD = Liver Reduction Diet) diet and then went in for blood tests 2 days before surgery.
With finance, the surgery is costing around £6,000 including the £500 upfront deposit you pay to secure your surgery day on consultation.
They sort the finance out for you and everything. So easy.
I don't think its recommended to go abroad for a band because the aftercare requires band fills for a couple of years later. With THG, they include either 2 or 4 years aftercare which includes the fills.