Pete Spence has written an excellent article on natural interest rates in the Daily Telegraph. He says,

The crisis came at an inconvenient time for policymakers. For the past two decades the so-called “natural rate” had been been trending downwards. This is the theoretical rate which best promotes growth and simultaneously keeps inflation in check. It has been a source of much debate among economists.

He goes on to cite the Kaleidic Economics estimates of the UK natural rate.

My intention is to update this on a regular basis and publish it on our Data page. It looks like there is some interest in this, and so I will focus efforts on providing it. This is great coverage, and especially encouraging that debate is moving in this direction.