HRP Safety
SAFETY IN USE
The best place to start when it comes to safety is your local club. Each club is required to have a safety office who can assist on the general questions of what testing id required before a model can be used, and may even run boiler testing services. In addition, club memebers are normally covered by the clubs "Public Liability" insurance while attending functions where the general public have access. The MSRVS provides all of these services as part of the mebership fee.
There are two useful publications from the HSE ( Health and Safety Executive ) Safe operation of miniature railways, traction engines and road vehicles Covers the use of steam models at public events specifically, while The amusement devices inspection procedures scheme (ADIPS) details the requirements if your using your model commercially for entertainment.