Sandcastle building workshops will be held at Pendennis castle over the weekend (July 21 and 22).

English Heritage, who look after 66 castles across the country, is organising the workshop and is calling for people to share photos of their sandcastles with the hashtag #LoveCastles.

Roy Porter, English Heritage Senior Properties Curator and creator of the ultimate castle, said: “A castle is surely one of the most awe-inspiring sights but if you look closely, all is not what it seems.

"These amazing structures are a brilliant mix of ages and types, reflecting changing threats and fashions over centuries. Part of the fun of visiting them is using a Sherlock-like eye to tease out their secrets!

“By studying hundreds of years of trial and error by the real castle builders our ultimate sandcastle contains everything you’d like to see, with each element showing off castle-building ‘perfection’ from a different era.

"I hope people will be inspired to build their very own ultimate sandcastle this summer – and support English Heritage to care for all our real castles so that they can continue to inspire us all for centuries to come.”

The workshops are suitable for the whole family from age 5 upwards, with adult supervision needed for under 12s, and they will be running hourly on Saturday July 21 and Sunday July 22 from 11am to 4pm.