All shares of the same class must receive the same dividend. For example, if you have 100 ordinary shares and vote a dividend of £10 per share then each shareholder must receive £10 for each of their shares. These dividends should be paid into an account in the shareholder’s name.
If you wish to pay different shareholders at different rates then you will need to have different share class. These are often, rather unimaginatively, called A shares, B shares, etc and usually referred to as alphabet shares. Each class may also have different rights (voting, distributions on winding up, etc) It is simplest if these different share classes are created at incorporation.
Alphabet shares need to be structured correctly to minimise any challenge from HMRC. Definitely not one to do yourself.