Raids have taken place across the UK in the wake of Wednesday's terror attack.

The police have focused on a number of places that have previously been associated with extremism.

Birmingham

According to the Metropolitan Police, Masood lived most recently in Birmingham where he hired a car to carry out the Westminster terror attacks.

A recent study found that a tenth of all Britain’s convicted Islamist terrorists - 26 in total - came from just five council wards in Birmingham.

The wards — Springfield, Sparkbrook, Hodge Hill, Washwood Heath and Bordesley Green — contain sizeable areas where the vast majority of the population is Muslim.