UPDATE at 1130hrs
The road is now blocked in both directions.
Diversions added.
603 to Swiss Cottage - From Heath Street, L Hampstead High Street, A Rosslyn Hill, A Haverstock Hill, A Chalk Farm Road, R into Chalk Farm Morrisons, circumnavigate roundabout, L Chalk Farm Road, L Adelaide Road, A Adelaide Road LOR.
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The road is blocked northbound, after Buckland Crescent, due to an RTC.
Routes affected: 46, 603
46 to St Barts - From College Crescent, R Buckland Crescent, A Belsize Park, A Belsize Avenue, L Haverstock Hill, R Pond Street LOR. Both directions.
603 to Muswell Hill - From Finchley Road, R Avenue Road, L Adelaide Road, R Chalk Farm Road, L Ferdinand Street, A Malden Crescent, L Prince of Wales Road, R Haverstock Hill, A Rosslyn Hill, A Hampstead High Street, R Heath Street LOR.
Diversion reference: D37155