Hayley Minn Sinking into a sun lounger with a glass of prosecco in hand, surrounded by lush greenery and a scattering of outdoor jacuzzis, I could easily be in Spain . But I'm actually in St Albans, Hertfordshire - just a 20-minute train ride from London - at my favourite spa in the UK: Sopwell House, home to The Club at Cottonmill, and part of the PoB Hotels group. It's the highlight of any stay here - and, for most people, the main reason to visit.