Hi BritishAl23,
The main effect for UK investors who have invested in non-reporting funds, as opposed to reporting funds, is that on disposal of their interests they will be liable to tax on any gain arising as if it were income (that is, an offshore income gain, or ‘OIG’) instead of as a capital gain.
IFM12300 - Offshore Funds: introduction: non-reporting funds
As you have not yet disposed of them or received a distribution, there is nothing to declare at this time.
Thank you.