How we work

Editorial policy

Our guides are written to help you decide, and we show where figures come from, what they do not cover, and when we last reviewed the page.

Plain language

We start with the problem you would recognise and only bring in trade terms when they actually help.

Any figure comes with a date, how we worked it out, and its limits. For standards and accreditations we go to the original source.

We fix anything important quickly and update the review date on the page.