Update: Met Office warns more fog on way to Norfolk and Suffolk
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The Met Office has issued a further fog warning for Norfolk and Suffolk - with drivers warned that visibility could be down to just 50m tomorrow morning.
This morning saw dense fog across parts of the two counties, with Norfolk and Suffolk Roads Policing Unit warning drivers to take extra care.
The Met Office had issued a warning yesterday that drivers would face reduced visibility today and have now issued a further warning that the two counties will be enveloped in fog again tonight and tomorrow.
They have issued a yellow warning, valid from 1am until 11am tomorrow, saying that fog will become widespread again, with visibility falling as low as 50 metres.
They said the fog will spread inland again quite early tonight, with patches forming more widely in the early hours of tomorrow.
Forecasters said the fog will then slowly clear through the mid-morning tomorrow.
The fog caused delays around Norfolk this morning, with police called to two crashes.
The A11 was partially blocked at Attleborough because of a crash on the roundabout near Breckland Lodge this morning.
Fire crews from Attleborough, East Harling and Wymondham had to help release one person from a vehicle following the crash, which happened just before 6.10am.
They also made the vehicle and surrounding area safe and gave casualty care.
Police said a Skoda estate had collided with a crash barrier but the injury was believed to be minor.
The road was cleared by 7.25am.
Emergency services also went to a crash in Drayton Lane in Horsford, just after 5.50am to reports of Vauxhall Vectra on its roof.
The road was blocked, but passable with care. It was cleared just before 7am and the driver was uninjured.
The warning for tomorrow is in place for Norfolk, Suffolk, Hertfordshire, Central Bedfordshire, Bedford, Luton, Cambridgeshire, Essex, Peterborough, Thurrock and Southend-on-Sea.