She has been talking about the postal votes and how they look for the Labour party.
Either it's misinformation she's been given, or she is just telling what she knows.
Either way, she should know the law about postal votes.
"Anyone attending a postal vote opening session has a duty to maintain secrecy. Ballot papers will be kept face down throughout a postal vote opening sessio"
"It may be an offence to communicate any information obtained at postal vote opening sessions, including about votes cast, before a poll has closed. Anyone with information to suggest this has happened should report it immediately to the police"
She should be aware of the rules and know when to keep quiet. I would have thought that since she had been caught out recently with tweeting fake news from Conservative sources, she would have been more careful.