Employment rights
Gross misconduct
Behaviour serious enough to justify dismissal without notice, even for a first offence, such as theft, violence, fraud or a serious breach of data or safety rules.
A plain-English explanation of how this usually works in the UK, not legal advice. Rules change, so check your own situation. For free, impartial advice on work rights, try Acas. Disclaimer.
You'll hear it as
Sharing customer data with a competitor is gross misconduct.
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