Actually on some further testing,

If I create a page from scratch, then there is no over-writing of the formatting
i.e. – https://www.woodworkersuk.co.uk/nick-test-for-icon-box-colours/

you can see the icon boxes are clearly displayed in Green & the font is the size I designed it at

But If I add the same widgets to any of the existing pages I get the following
– https://www.woodworkersuk.co.uk/wooden-gates/wooden-driveway-gates/

you can see the widgets have all been turned to Red & increased in size. “Delivery throughout the UK etc”

I cant see any CSS on the Page, Sections, Columns or Widgets that could be causing this.

Do you have any ideas on where to look?

nick