- Welcome to Builth Wells High School Croeso i Ysgol Uwchradd Llanfair-ym-Muallt The New 2002 Sixth Form Prospectus is now available on line. Please click on Reception above. last update 07-June-2002 Web site design by Wynn Davies Written using Arachnophilia, tested with Internet Explorer 6.0, 5.5, 5.02 for Windows and checked with Netscape Navigator 4.73 & Internet Explorer 5 for Mac (Thanks ...www.builth-hs.powys.sch.uk