Sky News report https://news.sky.com/story/leaked-eu-document-shows-brexit-punishment-plan-11239487 thus:
'According to a threat contained in a leaked Brussels document, the EU wants the power to restrict the UK's access to the single market during the transition period.Brussels would do so if it feels it would take too long to launch legal action to settle a dispute.
The five-page document is a draft treaty circulated in advance of EU chief Brexit negotiator Michel Barnier's whistle-stop tour of all the 27 remaining EU countries.
But Mr Rees-Mogg, speaking on the eve of the first of two crucial meetings of the so-called 'Brexit war cabinet' of senior ministers, told Sky News: "It's not something we could accept."
And Brexit campaigners claimed that if the EU refused to back down on its latest threat, then Brexit Secretary David Davis should walk away from negotiations and insist on a "no-deal" Brexit.
Even pro-Remain MPs hit out at the proposal, with leading Labour MP Chuka Umunna claiming a transition period was beginning to look "less like building a bridge and more like being made to walk the plank".'
I can't find any report about this on the BBC but that's not terribly surprising for the institutionally pro EU BBC.