Jeremy Corbyn has a new MP on the block after Labour won a by-election in safe seat Lewisham East .
But Janet Daby could end up being just as tricky for him as her predecessor - Remainer rebel Heidi Alexander.
She's the centrist favourite who triumphed over Momentum candidates in a bitter selection battle that ended in the local party chair being suspended.
And she's made clear she'll fight to keep close links to the EU - even when it's against Mr Corbyn's policy.
"I will fight for UK to remain in the customs union and the single market," she told one journalist on the campaign trail.
"Leaving the customs union and single market will have a disastrous effect on the economy and, as usual, it will be the poorest who suffer the most."
Lewisham backed staying in the EU by a whopping 70%, and its previous MP Ms Alexander led a battle to stay in the single market.
Mr Corbyn has insisted Britain will leave the single market.
But Ms Daby has said she will need to have "conversations" with the party leader and signalled she could vote against him.
"I would not put myself in a situation in which I have to make the short journey back from Westminster knowing that I have just voted to make the residents of my community poorer," she told the Independent.
Ms Daby, a mum of two in her mid-40s, was born to two Windrush migrants from Guyana and Jamaica and has lived in the south London constituency for 22 years.
She was brought up on a council estate where, as a child, racist thugs pelted her windows with eggs three nights in a row.
She only became politically active in the last decade but had already risen to become Labour Lewisham's deputy mayor.
She described herself as the “unity candidate” in the by-election with the backing of the Fire Brigades Union and Unison.
Lewisham East's local party is a stronghold for opponents of the Jeremy Corbyn backing group Momentum.
Momentum's candidate failed to win the nomination after a bitter battle marred by claims of a "stitch-up" by party HQ - which didn't come to pass.
As the row escalated the local party chair Ian McKenzie was suspended. Tweets of his had come to light claiming Shadow Cabinet minister Emily Thornberry was "too old" to be an ISIS sex slave.
