going underground

“She is very savvy and has cultivated the mystery woman mystique by going underground and then when she does come out, it’s a much bigger deal,” says Ms Jordan.

“It was called the Barrière d’Enfer, or Gate of Hell, and marks the beginning of the catacombs. This is where we’re going underground.”

An ex-independent adviser to the government on defining Islamophobia, Imam Qari Asim, said it would potentially "result in more extremism and people going underground".

My mother and her husband faced a range of options that included going to jail, going to Europe or Mexico, or going “underground,” which meant abandoning your current life abruptly and establishing a new identity someplace where no one knew you, a difficult but not impossible task in those days.

Among the elite units tasked with going underground is Yahalom, specialist commandos from Israel's Combat Engineering Corps known as the "weasels", who specialise in finding, clearing and destroying the tunnels.