A crowd of supporters gathered to meet weSadiq Khan in Willesden Green but he failed to show up.
The Labour mayoral hopeful was due to meet supporters and activists outside the tube station on Walm Lane but a call came through, saying he was held up elsewhere.
There is now only two weeks to go before residents cast their votes for the next London Mayor.
The Tooting MP was due to talk to activists before walking down to the central mosque to pray.
Graham Moonie, a spokesman for Mr Khan, said he had been ‘held up’ but didn’t say where.
Labour councillor Rita Begum, came to Willesden Greenfrom her ward Maida Vale with her three-year-old son Shakib.
She said: “We’re here. Shakib is a fan of Sadiq and wanted to come. He’s upset now he didn’t get to meet him. He mentions Sadiq all the time so I bet him all the way that he would see him.”
Cllr Muhammed Butt, leader of Brent Council, said: “This kind of thing happens all the time. He’s promised to come back so we’re all looking forward to him coming back.
There’s a lot of energy here, people are all excited and want to make sure we get Sadiq as Mayor in May.”
Mr Khan kicked off his campaign in Harlesden last month, joined by activists in Harlesden. He told residents of his plans to fix the housing crisis, freeze fares and bring a return to true neighbourhood policing.
He planned to talk to activists about his 10 point plan for tackling violent crime. He said: “People in Brent are facing a double-whammy – not only is violent crime rising, but at the same time fewer violent criminals are being caught. That’s a slap in the face to Londoners.
“As Mayor I will get tough on violent crime – with a particular focus on knife crime.
“We’ll map London’s gangs, make it harder for kids to buy knives, introduce tough community payback schemes and improve the information available to the emergency services.
“Working with dedicated officers like the armed response unit I have met, we will get a grip on violent crime.”
Mr Khan is battling it out with Conservative candidate Zac Goldsmith, Green Party candidate Sian Berry, Caroline Pidgeon for the Liberal Democrats, Peter Whittle for UKIP George Galloway of Respect and Ankit Love of the Love Party.
Residents can vote if they are aged 18 and over, living in London, and a British, Commonwealth or EU citizen.
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