A blaze has ripped through a London tower block, believed to still have Grenfell-style cladding nearly four years after the tragedy, despite multiple warnings from locals. 

More than 125 firefighters in 20 vehicles have spent the morning battling the blaze at New Providence Wharf, near Canary Wharf, in the east of the capital. 

London Ambulance Service said a 'number of people' have been treated, though the extent of their injuries is not yet known. 

Witnesses on social media reported that everyone inside the 19-storey building had been evacuated, with some claiming to have been allowed back inside their homes. 

However, London Fire Brigade was unable to confirm details of the evacuation. 

Parts of the eighth, ninth and tenth floors sparked alight just before 9am, as dozens of firefighters scrambled to the block of apartments, which overlook the River Thames and the O2.  

Homeowners reportedly weren't alerted to the blaze by the fire alarm for more than half an hour, with one resident claiming they only noticed when they woke up to the smell of smoke. 

Other witnesses reported seeing people 'stuck on their balconies and shouting for help' as dozens of people rushed to safety. 

The cause of the fire is not known at this stage. 

The building is believed to be covered in ACM cladding, the same type used on Grenfell Tower, which went up in flames in 2017 and local campaigners and politicians have long called for it to be swiftly removed.

Two years after the tragedy, which claimed 72 deaths, ministers pledged £200m for the aluminium composite material to be taken out from 170 privately-owned towers across the UK.  

However, work is understood to have never begun on making the change on site, despite the funding being available for some 24 months.