If you are having the fusebox replaced, all that is required is an Electrical Installation Certificate (EIC) for this work
Answered by Dave, Electrical Safety Expert
If you are having the fusebox replaced, all that is required is an Electrical Installation Certificate (EIC) for this work. Make sure that you use a registered electrician to do the work as fusebox (consumer unit) replacement is notifiable under Part P of the Building Regulations and a registered electrician can self-certify their work. If you were to use a non-registered electrician, you would have to notify your local Building Control before the work was carried out.
You can find a registered electrician local to you here.