Two hundred jobs are set to go in Norwich as a water heater manufacturer plans to close its factory in the city.
Heatrae Sadia is planning to consolidate operations at its site in Preston.
In a statement, the firm said, "We recognise that these actions will have significant implications for our colleagues in Norwich and Preston.
"However, we firmly believe that they are necessary to make the company stronger and to place it in the best position to face the future challenges and opportunities in the UK’s heating industry."
The closure's been described as a 'hammer blow' to the local economy by the Unite Union.
Unite regional officer Steve Harley said, "Unite representatives are meeting with a senior executive of the parent company Baxi Heating UK today, when we will be asking for the figures to justify the business rationale for this hammer blow decision.
"Norwich can ill-afford to lose more highly skilled manufacturing jobs, especially with the uncertainly over Brexit and given that Norfolk is a predominately rural county.
"This is cruel news for our more than 80 members at this company which is 99-years old. We will be giving maximum support to our members and their families at this difficult and very challenging time."