It’s almost a month since the new £5 note, bearing the image of Sir Winston Churchill, entered circulation.

Made from polymer, the new fiver was meant to be more durable than its cotton paper-based predecessor.

However, although the Bank of England insists that the new notes should last two-and-a-half times longer than the old fivers, some people have discovered that the new notes shrink in the heat.

Having been told the notes should survive in a pocket through a washing machine cycle, it appears that that the same is not true of the tumble dryer or an iron, as excessive heat seems to cause the note to shrivel up to less than half its original size.

People have taken to social media to share images of their shrunken notes.

One Twitter user joked “it’s only worth £2.50 now.”

A Bank of England spokesperson told the Mirror: “We are aware that polymer banknotes begin to shrink and melt at temperatures above 120C, so they can be damaged by an iron.”

Has your £5 note shrunk? Let us know in the Comments section below.