You may remember that last year, after a campaign by Which! The Office of Fair Trading (OFT) ruled that airlines had to include unavoidable charges, like debit or credit card charges, in advertised headline costs of flights. Clearly some airlines found this something of an affront to their profit projections.

Now, in a playground-style move, easyJet have told on another company for breaking the rules. Couched as assiduous concern for easyJet passengers, easyJet have not only dobbed on eDreams to the OFT, but also to the Civil Aviation Authority and our favourite consumer champions Which!, who will presumably frown them into submission.

Concerned that “hundreds of thousands of UK consumers” are being “duped” into paying more than they should, easyJet have declared all out war on eDreams, claiming its “illegally” advertised prices are “unachievable”, despite its own checkered past on engaging in similar practices omitting card and luggage fees.

Peter Duffy, marketing director of easyJet said: "The activity of eDreams means that we estimate around one million easyJet passengers are being duped into paying too much.

"The eDreams website has no authorisation to 'screen scrape' in order to sell easyJet flights and the way they present their prices is wrong and misleads consumers."

Richard Lloyd, executive director at Which? told yourmoney: "Companies must comply with the ban on excessive card charges that came in after our campaign, and shouldn't be misleading consumers by adding on charges late in the booking process. Trading Standards and the Office of Fair Trading should crack down on any company found to be breaching these laws."