Order online at Screwfix.com. Spaceslide single sliding glass door kit. Suitable for openings up to 800 x 2060mm. Minimum ceiling height required 2200mm. FREE next day delivery available, free collection in 5 minutes.
Made in North Yorkshire and available as a kit, apparently. Simple but sweet. This is the basic type I've made before. Using a cookie cutter for the windows always looks nice, but I'm no longer tempted to melt boiled sweets for 'glass' as they slowly stickyfy and melt on display.