Three attacks — described by Prime Minister Theresa May as " ... bound together by the single , evil ideology of Islamist extremism " — had occurred in the UK since March 2017 : at Westminster on 22 March , in Manchester on 22 May , and at London Bridge on 3 June . Following these , there were increased reports of revenge attacks against Muslims , and mosques had been targeted as a response to recent Islamist attacks
in Manchester
Manchester Arena bombing
2017 Finsbury Park attack