It all depends on the type of work you need doing but every electrician must be City & Guilds qualified and Part P Certified to legally be able to touch your electrics.
All our electricians are both these things so are fully qualified.
This guarantees all work carried out will meet the UK national standard, BS 7671 (requirements for Electrical Installations) which ensures your electrics are installed safely and correctly.
Plus once the work is finished you'll receive an Electrical Installation Certificate or Minor Work Certificate that confirm the work carried out meets BS 7671 as well as a Building Regulations Compliance Certificate to confirm the work meets Building Regulations.
By law, all homeowners and landlords must be able to prove that all electrical work meets Part P, or they will be committing a criminal offence. Local authorities can make you remove or alter the work if it doesn't meet building regulations.
Also when using a non-registered or certified electrician you are responsible for contacting your local-authority building control regarding your electrical work which does incur a fee whereas by using a certified electrician they take care of all this for you.