In government, politicians often mistake gestures for progress. It is disappointing to see Shabana Mahmood succumb to that temptation. The home secretary’s flurry of proposals are designed to signal purpose, but constitute a wishlist of demands that her department can’t deliver. Currently, those fleeing persecution are given a five-year right to stay in the country and can apply for settled status after that. Ms Mahmood wants refugees to stay in the country initially only for a 30-month period, and then review their status to see whether they will be allowed to remain in the country for another 30 months. After two decades in Britain, they could apply to stay here permanently.

Denmark is held up as the model. A decade ago a centre-left government there was under pressure, with a surging populist right and immigration dominating voters’ concerns. Danish Social Democrats claimed that getting tough on refugees helped them win the election. However, the reality was messier. Copenhagen stripped Syrians of protection, yet could not remove them, leaving people stuck in “deportation centres”, unable to work or live normally. The result was a permanently marginalised population in........

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