Please find below information from the GPC for your attention.
We have co-badged a template letter with the Royal College of GPs, that practices can use to write to private providers offering non-approved screening tests. Numerous private companies are offering screening that is not recommended by the UK National Screening Committee (UKNSC), and there is a lack of evidence of how results of private screenings are presented in NHS services and is of benefit to patients, which is a cause of serious concern. This follows our joint Position Statement on Screening by organisations which have not been approved by the UKNSC, which was published last year.
You can also access the letter here