I had a look on Company House and can’t find anything about them being shareholders in Mirror Water. I do see the BAER company they are referring to, not sure what they were looking for there.
I also stumbled upon Aslan’s new company, which his sister is a shareholder in.
NATIVE PLOT LIMITED - Free company information from Companies House including registered office address, filing history, accounts, annual return, officers, charges, business activity
find-and-update.company-information.service.gov.uk
The most interesting thing I saw is that last year some dude started Water Mirror Ltd