Found the information. Unfortunately, it appears to be minutes from a meeting rather than published guidance. However, it says - Self-Catering Accommodation
Recommendations for one or two storey properties, less than two hundred square meters per floor where all habitable rooms open onto the hall or landing which itself contains a final exit. Other properties may require
different provisions.
1. Risk Assessment: One must be completed, it should be recorded and kept available (strange as I would assume that they employ less than 5).
2. Fire Alarms: Interlinked hard wired Domestic type smoke detectors with battery back up should be fitted in the hall and landing ( Should conform to British Standard 5839 Part 6 LD3 Grade D system).
3. Emergency Lighting: In hall and Landing, generally integral with the smoke detectors though other types may be acceptable. ( Should conform to BS 5266 Part 1 2005 )
4. Fire Doors / Structural separation: Only required around garages that are used for parking automobiles.
recommended in Table B1, P67, Approved Document B, Volume 1, ISBN: 978 1 85946 261 4.
5. Fire Fighting Equipment: None (ROSPA).
6. Signage: Guest Notices.
7. Locks on Final exits: Single-action without key e.g. Turnbuckles/Thumblatch/Push Pads if alternative exit via windows not possible.
8. Information etc: When Guests collect the keys, provide a suitable guidance note and, when possible go through it to ensure they understand.