The Health and Safety Executive (HSE) has not provided any specific guidance to local authorities on (a) outdoor Christmas lights or on (b) outdoor lighting in general.
HSE has provided good straight forward guidance to local authorities on (c) working at heights. An operational circular (No 200/31) for HSE and local authorities on the interpretation and enforcement of the work at height regulations 2005 was published along with an inspection pack for enforcing authorities. These can be accessed through HSE’s website www.hse.gov.uk together with other guidance on work at height.