Newbie! Just got my first XK, 2007 frost blue coupe. The aircon clearly hadn’t been recharged for a while and produced a humid atmosphere. I found a mobile recharge company in Reading area. Came out of area in this slow season for him... and did my VW Passat and “Annabel” for less than VW had costed for the VW alone. Now have really good air con, he also checked the condenser for issues. Happy to provide the company name if allowed to!