Ross Hawkins, writing for BBC News:
Outsourcing firm Serco has apologised after accidentally sharing the email addresses of almost 300 contact tracers.
The company is training staff to trace cases of Covid-19 for the UK government.
It made the error when it emailed new trainees to tell them about training.
Serco said it had apologised and would review its processes “to make sure that this does not happen again”.
It seems like this is a simple case of someone not knowing how email works, and has either put all 300 addresses in the ‘To’ or ‘CC’ field.