The leading UK site for parents has had users data compromised by hackers then using 'Heartbleed' exploit.
Mumsnet sent an email to users, warning that the hackers may have passwords and personal messages before network administrators were able to fix the vulnerability.
The website has urged all users to change their passwords.
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Net migration from the EU fell by 75,000 in the year to September, leaving it at its lowest level in five years.
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A cold and frosty start to the day for many, with some patches of mist and fog in parts of central and northern England.