A street cleaner is tonight fighting for his life after being stabbed while confronting a suspected burglar.
Paramedics performed surgery at the scene of the attack in Shepherd's Bush before the man was air lifted to St Mary's Hospital in Paddington.
The attack happened yesterday in Rylett Road.
The suspect is described as white and 6ft 2in tall.
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Dozens of women gathered on Westminster Bridge to form a human chain in a show of solidarity with the victims of Wednesday's terror attack.
In a wide-ranging Peston on Sunday interview, he said Parliament security needs reviewing and the PM's counter-terror strategy is flawed.
The terror attack carried out by Khalid Masood at Westminster that left four people dead lasted less than two minutes say police.