Leasehold Advisory Service provides free advice on residential leasehold law. It is an independent body, and can provide initial advice and guidance on residential long leasehold (that is, a flat or house with a lease longer than 21 years) law. It also advises on fire safety to those leaseholders living in high-rise buildings.
Royal Institute of Chartered Surveyors (RICS)is the leading professional body for those working in the property sector. It has issued a number of guidance notes on the topic of building safety, particularly on the interpretation of how an EWS1 form should be issued and used. You'll also find a helpful FAQs on their website.
The Ministry for Housing, Community, and Local Government has published a set of documents which sets out their Building Safety Programme, and details the work that is taking place, in conjunction with landlords and residents, to make sure that buildings are safe.