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Chocolate lovers face paying 20 per cent more for their favourite treats after a post Brexit price surge.

Top selling chocolate bars including including Snickers, Double Decker, Galaxy, Mars, Dairy Milk and Bounty are set to cost 10p more this summer.

The increases are being blamed on Brexit as the pound’s fall in value puts up the cost of imported ingredients such as cocoa beans and sugar.

At the same time, other sweets are shrinking in size so retailers can keep the same price tag. Bags of sweets sold under the One Pounders brand have been reduced from 180g to 150g.

Price-marked bars made by Mars and Mondelez-owned Cadbury and Mars - mainly sold at convenience stores and corner shops - are rising from 50p to 60p.

(Image: Mirror Screen Grab)

It’s the latest in a series of price hikes blamed on the fall in sterling since the EU referendum .

As revealed by the Sunday Mirror earlier this year, bars of Cadbury Freddo and Fudge jumped from 25p to 30p while boxes of Cadbury chocolate fingers rose from £1.29 to £1.39.

And last week it emerged that Mr Kipling and Cadbury cakes - including Cherry Bakewell, Milk Chocolate Cake Bars and Flake Celebrations - have risen by as much as 25 per cent as a result of higher ingredient costs.

Supermarkets have repeatedly pledged to resist the Brexit-related rises. But latest official figures shows inflation has hit a five year high, rising from 2.3 per cent to 2.7 per cent in April, pushed up by rising shop prices, electricity bills and air fares.

A Mars spokesman said: “We have been absorbing rising raw material and operational costs for some time, but the growing pressures have led us to make the difficult decision to adjust the price of our price-marked bars.

(Image: Getty)

“With the price clearly displayed, these packs still offer shoppers the best possible value for money without compromising on quality or taste”

Mondelez said: “It is well reported that food and drink manufacturers have been experiencing increasing input costs for some time which, coupled with recent foreign exchange pressures, are making food products more expensive to make.

“We have, and continue to, carry these increased costs within our business as much as possible, because our priority is to keep our brands as affordable as we can.

“Increasing prices is always a last resort, but to ensure we can keep people’s favourite brands on shelf and look after the 4,000 people we employ in the UK, we have made some selective price increases with our customers in the UK. Ultimately it is the retailer who sets the price in store.”