Sellafield Ltd, the Nuclear Decommissioning Authority, Nuclear Management Partners, the National Nuclear Laboratory, the Low Level Waste Repository and Britain’s Energy Coast have all contributed.

The pledge is made up of cash donations totalling £271,000 and the rest of in-kind commitments to provide people, materials, equipment and expertise for as long as the community needs it.

The offer is county-wide and people in Carlisle, Appleby and Glenridding have been urged to get in touch if they need help.

An immediate cash injection of £71,000 has been made to Cumbria Community Foundation’s flood appeal by the nuclear industry.

It has also provided a team of Sellafield project managers to help develop Cumbria County Council’s recovery programme provided emergency generators to provide power at locations across Allerdale released dozens of staff to volunteer for emergency response teams In addition, Sellafield has given £35,000 to ensure this weekend’s Taste Cumbria festival can go ahead in Cockermouth as a county-wide open for business event.

Paul Howarth, chairman of the Centre for Nuclear Excellence, said: “As soon as floodwater began seeping into homes and businesses last weekend, our people were responding as volunteers, neighbours and nuclear professionals.

“We all learnt from the 2009 floods that we cannot allow the county to be seen as a no-go zone.

“We have to bounce back quickly and prove to the world that we’re ready to get back on our feet."

Workington MP Sue Hayman said: “This is not just about money, welcome though that is.

"The nuclear industry possesses a unique range of skills and capabilities that will be invaluable in helping to rebuild communities across the county, from Cockermouth to Appleby and Keswick to Carlisle.”