British breasts are getting bigger – and it’s the ladies living in the North, the Midlands and Ireland leading the charge.

Busts have grown by three sizes in just two years, with the best-selling bra size going up from a 34B to a 34DD.

And our cups are truly running over in Wales – with the most popular size being an E.

The research from Debenhams also revealed an astonishing 78 per cent of women admit to having squeezed into a bra that was a smaller size than they should be wearing.

Padded and push-up bras accounted for 70 per cent of bra sales from the store in the last year, compared to 36 per cent in 2010, suggesting the smaller-busted among us are keen to get in on the act.

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Head of lingerie buying and design, Sharon Webb, said: “Confidence is changing the shape of the nation. Fit is of paramount importance, a great fitting bra makes you look incredible on the outside and feel fabulous on the inside.

“If women want a bit of enhancement then they can invest in a simple padded or push up bra and see instant results by the fasten of a clasp - no expensive surgery required."

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• Number 1: Holly Willoughby

  Number 1 spot in the cleavage chart: Holly Willoughby. (Wonderbra Cleavage Hall) (Photo credit: PA)

• Number 2: Scarlett Johansson

  Number 2 in the cleavage chart: Scarlett Johansson. (Wonderbra Cleavage Hall) (Photo credit: PA)

• Number 3: Beyonce

  Number 3 in the cleavage chart: Beyonce. (Wonderbra Cleavage Hall) (Photo credit: PA)

• Number 4: Rihanna

  Number 4 in the cleavage chart: Rihanna. (Wonderbra Cleavage Hall) (Photo credit: PA)

• Number 5: Marilyn Monroe

  Number 5 in the cleavage chart: Marilyn Monroe. (Wonderbra Cleavage Hall) (Photo credit: PA)

• Number 6: Dita Von Teese

  Number 6 in the cleavage chart: Dita Von Teese. (Wonderbra Cleavage Hall) (Photo credit: PA)

• Number 7: Katy Perry

  Number 7 in the cleavage chart: Katy Perry. (Wonderbra Cleavage Hall) (Photo credit: PA)

• Number 8: Brigitte Bardot

  Number 8 in the cleavage chart: Brigitte Bardot. (Wonderbra Cleavage Hall) (Photo credit: PA)

• Number 9: Kim Kardashian

  Number 9 in the cleavage chart: Kim Kardashian. (Wonderbra Cleavage Hall) (Photo credit: PA)

• Number 10: Lara Stone

  Number 10 in the cleavage chart: Lara Stone. (Wonderbra Cleavage Hall) (Photo credit: PA)