It has been suggested that Boris Johnson's visit to Castle Rock School in Coalville yesterday was the subject of a cheeky dig by a librarian or English teacher.

And, if true, it happened in plain sight in front of a TV audience of millions.

The Prime Minister spoke to students in the school's library on Wednesday and admitted this year's exam results were 'almost derailed' by a 'mutant algorithm'.

But the Times Educational Supplement, in an article headlined 'Boris Johnson and the revenge of the school librarian', says the titles of the books on the shelves behind him may not have been put there by accident.

The article, by Amy Gibbons, says bookshelf behind him seemed to make 'a statement of its own'.

Amy writes: "Lining the shelf just behind Mr Johnson's head were titles with rather unflattering associations for any political leader, including "The Twits", "The Subtle Knife", "The Resistance", and "Betrayed".

"And sticking out like a sore thumb was "Fahrenheit 451", a dystopian novel about a society where books are banned.

"If you look closely, "Guards! Guards!", a Terry Pratchett novel, can also be glimpsed behind the PM's right shoulder.

"The story follows a plot by a secret brotherhood to overthrow a corrupt patrician and install a puppet king.

"And what about "Hero.Com: Crisis Point" – part of an Andy Briggs series where "super powers carry super responsibilities"?

"Did you spot "Glass Houses"? Granted, this one is a vampire novel. But could the famous proverb – "those who live in glass houses should not throw stones" – be a comment on Boris' harsh criticism directed at the exam regulator?

"And could Dickens' "Oliver Twist", famous for its heartbreaking line: "Please, sir, I want some more", be tactically placed on Boris' left to remind us of the government's free school meals U-turn, sparked by star footballer Marcus Rashford?

"Some might say even the most imaginative author could not envisage the events of the past few weeks in the education world.

"But somebody, perhaps, felt they had a story to tell the nation today.

"And all behind the PM's back."