Products 'add to cart' button linking to other products

Hi,

We have a couple of products that, when pressing ‘add to cart’, links instead to another product.

Any ideas what could be causing this? It’s a new issue, that seems to have started only recently (last few hours) !

Turns out, where ever you click on these particular product pages, it links to a different product page.

i.e. if I click to see more information on one of the tabs (eg. delivery) I am then redirected to another product…