On 22 March, the day of the attack, the Metropolitan Police said it believed the attack was inspired by "international terrorism"[REF][REF] and that they were working under the assumption that it was "Islamist-related terrorism" [REF].
Describing Masood as a "terrorist",[REF] the Metropolitan Police said it was investigating whether he was a lone actor inspired by terrorist propaganda or was being directed by others [REF].