Barney, I stand corrected. I must apologise for my earlier post. According to 17th Edition IEE Wiring Regulations, any "competent person" may install electrical equipment in or across a garden. Local Building Control must be notified before installation commences unless it is being carried...

To install mains electricity anywhere in a garden, you must use a "Part P" qualified competent person. Ask a trade association such as NAPIT (napit.org.uk) for details of competent members in your area. Cables attached to structures must be external quality. Do not use grey flat twin and e...