2. See appendix 2
4. Portable appliance testing (PAT) is the term used to describe the examination of electrical appliances and equipment to ensure they are safe to use. The frequency of inspection and testing depends upon the type of equipment and the environment it is used in http://www.hse.gov.uk/electricity/faq-portable-appliance-testing.htm. In the private rented sector, landlords are required to ensure that any appliances they provide are PAT tested every 5 years.