Northern Ireland Protocol

I start by unreservedly congratulating my right hon. Friend on what seems to be a spectacular negotiating success. With the Windsor framework, he has succeeded in delivering a deal that eliminates the issues of the Irish sea border and addresses the practical issues in Northern Ireland on food, pets, plants, parcels, medicine regulations and tax rules. Above all, it introduces the extraordinary mechanism of the Stormont brake. I am unaware of any such mechanism in any international agreement, and it seems to me to be a brilliant piece of negotiating insight and imagination. As we do not all know the detail, can he explain to the House exactly how this mechanism will work and what its limitations will be?