I had my first sessions at Mickley Hall near Nantwich, Cheshire http://mickleyhall.com/
Run by father & son John & Scott and really friendly vibe around the place. Gun hire etc all no problem, and covered stands so it doesn't matter if its raining. Sporting targets of all levels of difficulty and a shooting lodge that does teas / cakes and somewhere to debrief before / after the shoot.
Perfect place for starting out IMO