Does JD Wetherspoon add a service charge?

We checked Wetherspoon's own FAQ hub, app terms and a current menu, and none of them says whether a service charge is added. The common claim that Wetherspoon never adds one comes from third parties, not from the company's own site.

If you've been charged one at a JD Wetherspoon branch, you can add a report on that branch's page so other diners know.