has to stay in place. northern ireland continuing to follow single market rules, the european court of justice the ultimate arbiter of that. so again, it is this idea of british sovereignty versus the eu trying to protect it single market. it may sound like a familiar argument, but it is entering a new phase. thank you very much, jessica parker, in brussels. in a moment, we'll talk to our ireland correspondent, chris page. he's in belfast. but first, let's go tojonathan blake in westminster. jonathan, there are claims that this was the british government's tactic all along. was the british government's tactic all alonu. , ~ all along. yesterday, the brexit minister lord _ all along. yesterday, the brexit minister lord frost _ all along. yesterday, the brexit minister lord frost said - all along. yesterday, the brexit minister lord frost said the - all along. yesterday, the brexit minister lord frost said the uk| all along. yesterday, the brexit - minister lord frost said the uk had signed up to this protocol with its hands tied and that the world had moved on. the two sides now have a trade deal in place and the protocol is causing problems which need to be fixed. that position has been characterised slightly differently by the prime minister's former senior adviser dominic cummings, who was tweeting last night saying boris johnson didn't have a scooby do what the deal he signed up to meant and always intended to ditch the bits he