My copy of IET Guidance Note 3 2018 (albeit not the latest 2022 version) states the following for a routine check.

3.5 Routine checks
Electrical installations should not be left without any attention for the periods of years that are normally allowed between formal inspections. In domestic premises it is
presumed that the occupier will soon notice any breakages or excessive wear and arrange for precautions to be taken and repairs to be carried out.
Commercial and industrial installations come under the Electricity at Work Regulations 1989 and formal arrangements are required for maintenance and interim routine checks (as well as periodic inspections); there should also be facilities to receive wearand-
tear reports from users of the premises.

The frequency and type of these routine checks will depend entirely upon the nature of the premises and should be set by the electrical duty holder. Routine checks should
include the items listed in Table 3.1. Table 3.2 (Section 3.7) provides guidance on the frequency , which may need to be increased as an installation ages.

Table 3.1 Routine checks:

Note that routine checks need not be carried out by an electrically skilled person but
should be undertaken by somebody who is able to safely use the installation and
recognise defects 

There is a general on-going requirement to manage health and safety at work, and
electrical safety is just one area. To ensure that regular routine checks are made on the
electrical installation it may be advantageous in larger premises to combine these with
other regular checks such as emergency lighting and fire alarm inspections, general fire
safety inspections, emergency exit route inspections etc on security patrols. All results
should be noted on a simple form and filed for any future reference

Paul

My copy of IET Guidance Note 3 2018 (albeit not the latest 2022 version) states the following for a routine check.

3.5 Routine checks
Electrical installations should not be left without any attention for the periods of years that are normally allowed between formal inspections. In domestic premises it is
presumed that the occupier will soon notice any breakages or excessive wear and arrange for precautions to be taken and repairs to be carried out.
Commercial and industrial installations come under the Electricity at Work Regulations 1989 and formal arrangements are required for maintenance and interim routine checks (as well as periodic inspections); there should also be facilities to receive wearand-
tear reports from users of the premises.

The frequency and type of these routine checks will depend entirely upon the nature of the premises and should be set by the electrical duty holder. Routine checks should
include the items listed in Table 3.1. Table 3.2 (Section 3.7) provides guidance on the frequency , which may need to be increased as an installation ages.

Table 3.1 Routine checks:

Note that routine checks need not be carried out by an electrically skilled person but
should be undertaken by somebody who is able to safely use the installation and
recognise defects 

There is a general on-going requirement to manage health and safety at work, and
electrical safety is just one area. To ensure that regular routine checks are made on the
electrical installation it may be advantageous in larger premises to combine these with
other regular checks such as emergency lighting and fire alarm inspections, general fire
safety inspections, emergency exit route inspections etc on security patrols. All results
should be noted on a simple form and filed for any future reference

Paul