You asked

Where can I find sell side private acquisitions in the UK, Europe or other countries?

We said

Mergers and Acquisitions undertaken directly by private individuals within the UK and abroad are not collected by the Office for National Statistics (ONS) Mergers and Acquisitions survey. However, this level of information may be found via a number of other sources such as:

London Stock Exchange
Dun & Bradstreet
Bureau Van Dyke
Mergermarket

If you have any additional questions regarding mergers and acquisitions, please contact the Structural and International Statistics team - m&a@ons.gov.uk