Significant control of a company also relates to voting rights and share holding although they are usually one and the same, however some shares have more than one vote per share even no voting rights at all eg I hold shares in a Management Company that gives me 10 votes for each share, and in this case my voting rights rather than my shareholding gives me significant control of the company.
Whilst some of the information held at Companies House is not always 100% reliable, most larger company accounts are independently audited and the annual Confirmation Statement should identify the shareholders go to Companies House, search for Morgan Motor Company and the look at the updated Confirmation Statement for 24/2/2020 gives you some detail of the transfers of shares.
https://find-and-update.company-information.service.gov.uk/company/07459137/filing-historyWhilst this is an interesting discussion, it can sometimes become a little indelicate, and true control of a company may also in effect be maintained through debentures, loans or mortgage agreements or other charges through covenants and charges on assets etc rather than just by shareholding alone.
