Hi Kenthopvine, "will soon be shown how to use a CPAP machine" - have you been advised to inform DVLA as your licence will be suspended until your clinician confirms that your apnoea is controlled!
I doubt that the NHS will be offering an operation anytime soon as the CPAP machine costs around £300 (to them) and lasts 5+ years. Other than that an annual(ish) review and a new mask every now and then makes it a fairly cheap solution!
Weight loss can help (and sometimes cure) apnoea but even then the NHS aren't very interested in assisting (personal experience of that) so, unless you plan to fund the operation and journey abroad for it, then I guess CPAP will be your only option!
CPAP machines - usually an automatic machine is provided to establish the pressure needed then swapped (within 2 weeks) for a manual pre-set machine based on the average pressure. Dry mouth is normal but can be partially overcome by use of a humidifier (small water container attached to the machine) and a heated hose to stop water droplets collecting in the hose. Nasal mask if you're a nose breather or face mask if you're a mouth breather - lots of different masks available - and because people don't get on with the first one supplied many stop using the treatment rather than finding the best one for them.
All sounds horrendous BUT all worth it when you are awake in the day!! Yes, I do use CPAP (for the last couple of year)