The 18th edition wiring regulations and On-Site guide are a handy couple of documents for anyone involved in the electrical trade or about to undertake electrical exams, and in many cases an absolute must have! These PDFs might get you out of a muddle when you don't have your physical copies with you, but by no means a replacement. Hope they help! If anyone comes across the PDF of Guidance Note 3 (Inspection and Testing), please share! Thanks