Tax on gains made on company shares forcibly sold on acquisition

Dear HMRC I have company shares given to me via a company share program from a company I left few months ago. These shares were taxed at the moment they were given and shown in payslips. Now the company was acquired and shares were automatically converted to cash at the acquisition price which realised some gains I was not planning to take this fiscal year. Are those gains fully considered capital gain or there is some different tax treatment? Thanks

Hi,
Please refer to:
 Tax and Employee Share Schemes.
Thank you.

Thanks for the answer, I have read the guide and its not clear to me if my share plan is a SIP or not, would that be laid out in the share plan T&Cs? also in my case I didn't sell the stock, it was converted to cash at the price agreed by the acquisition and put in the shares account, does that count as if I decided to sell the stock?

Hi ,
 

Yes you would need to clarify with the t&c and or the actual company the shares plan is with. This will then affect the position of your 2nd question . Thank you .