On August 1st 2019, United Utilities paid out its August dividend.
£0.2752 a share.
https://www.unitedutilities.com/
What was the cost of the dividend ?
United Utilities as 681,888,000 shares in circulation:-
681,888,000 x £0.2752 = £187,655,577.6
That is £187m
4% yield.