Partial taxation of dividends for company directors

I am trying to understand how exactly dividends are taxed in Switzerland when you are the owner/director/majority shareholder in a company.

All my research (including a consultation with a tax advisor) suggests that different rules apply to dividends when the person drawing the dividend owns 10% or more of the company. A concept called "partial taxation" seems to apply.

Here is an example of the sort of information I've found:

Partial taxation of dividends

The partial taxation of dividends from qualifying participations (10% or more of the capital) is set at 70% at federal level (before: 60%) and shall amount to at least

50% at cantonal and communal level (before: no lower limit). The cantons are free to opt for a higher limit.

From my chat with the advisor (which was a while a go) I understood that it is a certain proportion that gets taxed, i.e. first 30% is tax free and then 70% is then taxed at normal rate. Is that correct? Has anyone encountered this?

The reason I am asking is because I own a company in the UK and I want to take out some of the profits as dividends. But before doing that I want to understand what it would cost me in terms of Swiss tax, and then use that information to decide whether to do that or not, and if so then play with the number to decide how much I'd like to take out.

Has anyone been in a similar situation, or done any research into this topic?