11 High Street, also known as Mrs Pratchett's sweet shop, is a two-storey residential building in Llandaff, Cardiff, Wales.

[1] In September 2009 a blue plaque was unveiled by his widow, Felicity, and his son Theo, on one of his favourite sweet shops.

Roald Dahl and his friends used to call at Mrs Pratchett's Sweet Shop fascinated by the delights in there.

[6] The owner of the building is now Mrs Han Lau, who had turned it into a Chinese restaurant called The Great Wall around 2009.

[7] In his 1984 autobiography, Boy: Tales of Childhood, and his book The Great Mouse Plot, Dahl describes the shop as "the very centre of our lives.

[7] Dahl wrote in Boy: Tales of Childhood that the owner of the sweet shop was "a mean and loathsome old woman named Mrs Pratchett" (a pseudonym for Catherine Morgan).

"[6] As a seven-year-old,[8] Dahl, along with four other boys,[4] decided to put a dead mouse in a gobstopper jar to terrify "Mrs Pratchett".

[6][7] The next morning the boys walked past the sweet shop only to find it closed, with the gobstopper jar smashed over the floor.