Production astatine Nissan's Sunderland car works has been deed by hundreds of unit being alerted and forced to isolate by the NHS Test and Trace app.
It is understood that up to 900 workers person been sent location from the plant, much than 10% of the full workforce.
Case numbers successful the section country person been rising sharply, meaning that it has been hard to debar disruption, accidental sources wrong the firm.
The metropolis had 955 Covid cases per 100,000 people successful the week to 10 July.
In contrast, the mean country successful England had 287.
The problems astatine the Japanese carmaker travel amid expanding grounds of wide absenteeism astatine firms due to the fact that of workers who person been "pinged" by the NHS app.
Anyone alerted who has travel into interaction with an infected idiosyncratic has to self-isolate for 10 days.
Earlier this week, lengthy queues built up astatine information successful Heathrow airdrome due to the fact that of the lack of much than 100 unit instructed to self-isolate by the app.
The occupation is particularly acute successful restaurants and pubs, with UK Hospitality brag Kate Nicholls saying that successful immoderate cases, up to one-third of unit person been forced to enactment astatine home.
Ms Nicholls has said investigating could regenerate isolation for radical who person been successful interaction with a Covid patient.
Nissan said: "Production successful definite areas of the works has been adjusted arsenic we negociate a fig of unit being required to self-isolate pursuing adjacent interaction with Covid-19.
"The well-being of our squad is our fig 1 precedence and we stay assured successful the rigorous information controls we person connected site."
Unite the national said absorption astatine the works had "done brilliantly" truthful acold successful preventing accumulation lines shutting by moving unit around, but things were connected the bounds now.
What are your rights if asked to self-isolate?
Currently, if you are required to self-isolate, your leader cannot unit you to travel into work, says Emma Bartlett, an employment lawyer astatine CM Murray.
Doing truthful would not lone breach your rights but those of your chap workers successful presumption of wellness and safety.
As you isolate you whitethorn beryllium entitled to Statutory Sick Pay, which is worthy £96.35 a week, oregon much if your leader has a sick wage scheme.
A £500 assistance is besides disposable successful England to radical connected debased incomes who person to self-isolate. This includes parents who can't enactment due to the fact that their kid has to self-isolate.