What is productivity and why is the UK's so poor?

Productivity has barely grown in the UK since the financial crisis, and now lags 35% behind Germany and 30% behind the US

The shortfall in productivity compared with other developed economies has long been Britain's economic achilles heel. It is a problem that Conservative and Labour chancellors have been grappling with for decades.

Productivity is a guide to how good a country is at delivering the goods and services that are bought and sold. Technically, it is the rate of output per unit of input, measured per worker or by the number of hours worked. In layman's terms, it is a measure of what goes in and what comes out.