The food deal, ahead of a UK-EU summit later this month, is the most significant part of the so-called Brexit reset agreed so far.

The move comes as the prime minister begins talks about the UK issuing a formal apology for the slave trade in the next year.

Angela Rayner previously said plans were "un-British" and ministers shouldn't shift "the goalposts".

Lockhart had called for the DUP to remove First Minister Michelle O'Neill from office.