Zaher Zaarour, 26, charged after Shazad Khan was stabbed to death in north-west London

Man and woman held in custody over killing of Shazad Khan, 41, as police teams search scene

Shazad Khan, 41, was well known in Monks Park, Wembley after starting to operate van about a year ago

Shazad Khan was pronounced dead at the scene on Tuesday evening

Zaher Zaarour, 26, charged after Shazad Khan was stabbed to death in north-west London