Much as a find it difficult to believe that all is above board at Sarrries, I am still unclear as to where the remuneration is in these schemes (at least in the present).
If these are joint investments then the tax office will be happy so long as they get their tax on any profit. Only if ownership changes will there be a potential tax issue, then only if it is there is an undervalue sale.
For all the ifs and buts about what might happen later, what has actually happened (so far as currently available information goes) as of today that contravenes anything?