The law requires that the Responsible Person arranges for a risk assessment that is "suitable and sufficient". Many people are able to do their own assessment but others need the help of a competent risk assessor.
There are many skilled and competent fire risk assessors who advertise their services locally. Staffordshire Fire & Rescue Service does not recommend individual assessors or service providers. We would advise you to seek at least two quotes and recommend that you consider someone with Third Party accreditation or from a register such as:
For further information on selecting a suitable fire risk assessor please take a look at A Guide to Choosing a Competent Fire Risk Assessor.