A fortnight ago, we told you how we were going to comply with the new British Standard regarding system cleaning - BS 7593:2019:

We will be introducing on-site system Inhibitor level tests as part of any Annual Service or Gas Safety Check, at no extra cost.
We’ll be updating the booking system to make it easy and convenient for our customers to opt to have their systems cleaned and/or re-dosed with central heating inhibitor during an Annual Service or Gas Safety Check if they know their systems have not been cleaned or re-dosed with inhibitor within the last 5 years.
We will use automation to send customers a free non-obligatory quotation to install a magnetic system filter to central heating systems that we work on that do not currently have one fitted.
For hard water areas above 200ppm, we will use automation to send customers a free non-obligatory quotation to install a scale reducer to systems that we work on that do not currently have one fitted.
We will continue to ensure central heating systems are cleaned, flushed and inhibited when we install a new boiler.
We’re pleased to announce that these changes are now Live and will now be available on the booking system for Annual Service and Gas Safety Check jobs.