The manufacturer states this should be done annually. If your boiler is under warranty then to keep warranty active it MUST be done annually.

Average time for a service is around 45min to 1 hour.

You must have your property inspected every 12 months by a Gas Safe Registered Engineer.

They will carry out detailed checks on any Gas Appliances and also test the Gas Pipework in the property.

As of October 2022 you must also have a Carbon Monoxide Alarm in each room that contains a Gas Heating Appliance.