JOHN Lewis prides itself on being 'never knowingly undersold', though it seems its own staff have failed to take the motto to heart. 

One sales shopper at the department store's new flagship shop in Oxford's Westgate spotted this questionable retail tactic while browsing the clearance sale. 

This Ted Baker garment had been 'reduced' from £49, though the sale price has been set at £69. 

After tweeting John Lewis to complain, the retail giant acknowledged its mistake, conceding that 'someone needs to go back to school' and promising to rectify the error.

Have you found any other 'bargains' at John Lewis? Let us know