The Mirror offered readers the opportunity to see through the eyes of UKIP supporters with a free web app last week.

The UKIP Goggles extension changes the words Euro, France and Scotland to 'Funny money', 'Frogs' and 'Colony' respectively when web browsing on Google Chrome.

But the publisher's own staff had to be advised on how to delete the app after the IT department realised it was affecting its internal content management system.