The effects of the weekend snowfall continued to be felt across Norfolk yesterday, with forecasters warning of further snow showers.

With temperatures set to stay low, the snow and icy conditions are set to remain until the end of the week.

There was a day off for thousands of pupils yesterday as more than 30 Norfolk schools, mainly in the west of the county, fell victim to the weather, but travellers endured a frustrating day of delays.

Last night forecaster Chris Bell of Weatherquest, in Norwich, said that showers moving off the North Sea could bring more than an inch of snow overnight into this morning.

'It won't be in a front as we saw at the weekend, but there is the potential for accumulation. The bulk of it will be overnight, and could leave between one and three centimetres of snow. Most of the showers will be gone by the morning, but temperatures will remain low. There's no sign of it warming up, and we're not likely to lose the snow cover we have before the end of the working week. Our best chance of shifting the snow was probably on Monday.'

On the first weekday of full service under new rail operator Abellio Greater Anglia, passengers on the Norwich to London line suffered morning delays of up to 40 minutes due to signalling problems at Manningtree and London Liverpool Street. A broken train at Colchester caused more trouble from mid-morning, leading to delays of up to an hour in both directions, though services had returned to normal for the evening rush hour.

On the roads, Norfolk police reported several collisions across the county yesterday morning, though none resulted in serious injury. Snowy conditions led to delays on untreated roads though there were only minor delays on Anglian Bus and Norfolk Green services.

The East of England Ambulance Service saw a 20pc surge in calls on Saturday and Sunday, compared with the same weekend last year. Para-medics were called to nearly twice as many collisions as in 2011 – 65 – but only one needed hospitalisation.

In Suffolk, gritting teams were due to carry out two runs on A and B roads – the county's priority network – before an early-morning treatment of the bus and commuter routes.

Depending on conditions and resources, footways on main approaches into towns were due to be gritted, but members of the public were urged to assist by using grit bins to treat pathways near them.