The Part P requirement is that: "Reasonable provision shall be made in the design and installation of electrical installations in order to protect persons operating, maintaining or altering the installations from fire or injury.
NICEIC is the UK's leading voluntary regulatory body for the electrical contracting industry. It has been assessing the electrical competence of electricians for nearly sixty years and currently maintains a roll of over 26,000 registered contractors.
A 'split load' arrangement is used where circuits are protected by one of two RCD's. Circuits are generally split by load or balanced across the two RCD's equally for example RCD one might have the kitchen sockets, the upstairs lights, the immersion, RCD two might have house sockets, downstairs lights, and the shower.
The Smoke and Carbon Monoxide Alarm (England) Regulations 2015 came into force on the 1st of October 2015. These regulations require a smoke alarm to be installed on every storey of the premises on which there is a room used wholly or partly as living accommodation. A carbon monoxide alarm must be installed in any room which is used wholly or partly as living accommodation and contains a solid fuel burning appliance.
Private sector landlords are required from 1 October 2015 to have at least one smoke alarm installed on every storey of their properties and a carbon monoxide alarm in any room containing a solid fuel burning appliance (eg a coal fire, wood burning stove). After that, the landlord must make sure the alarms are in working order at the start of each new tenancy.
The requirements will be enforced by local authorities who can impose a fine of up to £5,000 where a landlord fails to comply with a remedial notice.
https://www.gov.uk/government/publications/smoke-and-carbon-monoxide-alarms-explanatory-booklet-for-landlords/the-smoke-and-carbon-monoxide-alarm-england-regulations-2015-qa-booklet-for-the-private-rented-sector-landlords-and-tenants
