We already knew that the government was SLOT XO planning to allow some key workers who are fully vaccinated to be exempt from the rule to self-isolate if they are pinged by the app.
But we don't know which workers they will be - or when the list will be released.
Kwasi Kwarteng, the UK business secretary, says the guidance on which workers are exempt will be "particularly in relation to critical infrastructure, things like nuclear power stations, things like general power stations which effectively keeps the lights on".
The list will be "very narrow" says Kwarteng - "simply because we don't want to get into a huge debate about who is exempt".
He says the guidance will be "forthcoming soon" - although he can't say exactly when it will be released.
And he hopes the rule to self-isolate if pinged will be scrapped for all fully vaccinated people on 16 August.
Kwarteng is also questioned about the impact of the pandemic on supermarkets and the photos of empty shelves.
"The concerns are legitimate and I've seen the pictures as well. It's not a universal picture and I think people can shop. And we're obviously reviewing the situation all the time.
"What we can't do is get into a position where we're changing the rules on a daily basis."