In terms of total GDP, it is the sixth- or ninth-richest, depending on which measure you use. In terms of GDP per capita, it is the 20th- or 27th-richest.
Ultimately the calculations are complicated but by all recognised measures the UK has either slipped one place at best or possibly as low as 27th.
Whichever it is a sad indictment of austerity and Tory policy.
It is however important that this information is available to all politicians… to enable them to be able to accurately inform us all.