One firearms officer is believed to have suffered a broken wrist while the suspect in Edmonton was being detained, police said.
Police added that a stun gun was discharged during the operation.
More top news
Key campaign claims by both sides in the EU referendum have been strongly criticised in a scathing report by a cross-party group of MPs.
The 12 finalists will battle it out on Saturday night - but who is your favourite to win?
Showers continue across some southern and western areas tonight.