I have sold some unit trust investments, £80,000 worth, in tax year 21/22.
These units were left to me by my mother in 1994 and I have no idea of their value then nor any paperwork from probate.
Where do I get the 1994 values from that is acceptable to HMRC, ie is there some official register or a format of pricing data that is acceptable from the fund managers?
Is an email from a fund manager saying this is the mid price on this date acceptable?
Do I have to send any proofs with the return?
What exactly do I need to do to avoid a to and fro with HMRC?