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Instead, they include harrowing names like the Ghost pepper, the Carolina Reaper and other hybrid peppers that boast high Scoville units.

He told BBC News the detention of his parents - who have lived in Afghanistan for 18 years and ran education projects - had been "harrowing and exhausting" for their family.

"I have pretty harrowing memories of primary school of always having the scraps," says George Williams.

The prime minister said the show was "at times harrowing" but had "lit a touch paper" under the debate about the issues.

He doesn’t have much interest in his pupils, the harrowing political situation or even friendships.