29-year-old Hassan Hussain and 20-year-old Yassin James sprayed bullets at Sabrina Moss and her friends as they sheltered from the rain outside a bar.
Her friend Sabrina Gachette was lucky to survive after being hit in the back with a sawn off shotgun during the attack on the high street in South Kilburn.
The two women were only hit because they were standing next to the intended targets - members of the South Kilburn Gang.
More top news
Shocked neighbours have told of their fear and paid tribute to a "nice lady" found stabbed to death at her home in Muswell Hill.
The deputy leader of far-right group Britain First has been arrested in London over a speech made at a rally in Belfast this summer.
Captain Mike Green, a senior flying instructor, was piloting the two seater helicopter involved in the crash.