Its at Lomer Farm , Past the Milburys Pub . Before the 100 mtr of tarmac where you do 90′ left through a gate and dive down through some woods.
Ive never used it mind , always been topped up as its not that far from winch
Also , the tap on the back of the cafe at QECP , it might be me but its tasted musty the last few times ive topped up bottles there. The standpipe they had before in the feild was lovely so i wonder if theyve changed the feed during the rebuild to harvested rainwater or some other oddball supply