Norwich's Gonzo's Tearoom is the latest venue to be hit by the NHS test and trace app - being forced to close down temporarily.
The London Street bar and restaurant is closed, hoping to reopen on Friday after being 'hit hard' by the app.
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And Zaks' Waterside restaurant, in Barrack Street, only just reopened since it too shut down on July 1.
Brad Baxter, boss of Gonzo's, said: "We just didn't have enough staff to stay open but we are hoping to reopen on Friday. We are also refitting our kitchen so it made sense.
"We have around 40-50 staff but we need that number to operate all our rooms, it's no major drama."
Bosses of Zaks American diner restaurants, Ian Hacon and Chris Carr, thanked their customers for being patient while the Waterside venue was closed for 12 days.
"Thank you for your patience and support. You will be happy to know all the team are safe and well."
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