The consumer unit, or fuse board, is where every circuit in the house is protected. Older boards with rewireable fuses, or plastic units without RCD protection, are among the most common reasons a house fails an EICR. Replacing the board is often the single most effective safety upgrade you can make.
A consumer unit change is notifiable work under Part P of the Building Regulations. It has to be notified to building control and certified, and that matters when you come to sell or let the property.
We test before we quote
A new consumer unit with RCDs will expose faults the old fuses never noticed: a borrowed neutral, low insulation resistance, a cable damaged years ago. That's a good thing, but it means we test the existing circuits before we fit the board, so you know about any problems up front rather than on the day. Main protective bonding to the gas and water also has to be up to standard, and we'll include it if it isn't.
On the day
Most domestic boards are changed in a day, with the power off for much of it. We label every circuit, test each one after connection and leave the installation fully working. You receive an Electrical Installation Certificate, and the building regulations compliance certificate follows once it's been notified.