more from nick on that in a moment and we'll also hear we'll talk to dame harriett baldwin, a conservativereasury select committee and is a former treasury minister. elected injuly, labour mp yuan yang, also on the treasury select committee, and tim farron, the former lib dem leader and the party's environment spokesperson. first, though, let's hear from ben chu, our one time economics editor, now two floors down with bbc verify. ben, what's happened? it has been a rough day for the government on the financial markets. let's look at uk ten year borrowing costs, this blue line. as you said, it has reached about 4.8% and that is the highest it has been going right the way back to the financial crisis in 2008. how does this compare to the bond market, the reaction to liz truss�*s mini budget in 2022? we can see it on the chart here. the rise in recent weeks was not as sharp as in 2022 but of course now it is at a higher level thanit course now it is at a higher level than it was back then. so why does this matter? essentially, this blue line determines the rate at which the uk government can