CGT status on SIPs Accumulated Shares when Company Sells you bit to Another Company

Hmmok

I took part in several SIPs offers by my previous company over a number of years.

Shares for all these were kept in a single account, even when some reached the 5 yrs maturity.

The company then sold the part I was in to another company, and in terms of the SIPs I was classed as a good leaver in relation to all the shares in SIPs offers that had not reached the 5 yrs, and all the shares (naturally matured or not) remained in a single Eqateplus account but that account now sits independent of my old company, i.e. in my name only.

My understanding, from the negligible information my old company offered up under continued pressure by myself to get an answer, which seems to match what I can find on line but not always clear between sites and the HMRC site is also confusing, is that for CGT purposes, the baseline date is the date my old company sold the bit of the company I was in and the share account dropped out of the SIPs 'shell'.  i.e. That any profit for CGT purposes should I sell the shares in a couple of years time would be in relation to the price on the day my old company sold the bit of the company I was in.

Is this correct?

Hmmok

Thank you.  I will check the date my matured shares and good leaver shares were moved over to my own account when the company was sold, and confirm the share price on that day on my old company's website, as the historical price for each day are available there.