These five charts summarise economic and other developments since the Brexit referendum in June 2016.
This first chart compares actual GDP per person (the red line) with two (green and blue) pre-referendum trend lines. The gap is now around £450-650 per person pa.This is consistent with the Treasury's pre-referendum long term forecast. For more detail, see the notes at the end of this web page.
This next chart summarises currency traders' valuation of the £ Sterling.
Sterling fell by around 12% over the weeks following the referendum and then recovered slightly. It was around 8% down last month.
Note: Most commentators focus on the £/$ and/or £/€ rate whose change can be seen in real time. This Exchange Rate Index is however much better as it melds together all the UK's exchange rates in proportion to our trade flows around the world. It is therefore the composite rate seen by all our exports and importers.
When measured in £ Sterling, the immediate effect was to increase the cost of imports by 12% thus increasing the trade deficit to 9% of imports. Over time, however, the UK should have begun to export more (as our products appeared to cost less to overseas buyers) and import less. This correction happened quite quickly but a significant trade deficit nevertheless persists and appears to be growing.
Unsurprisingly, net immigration from the rest of the EU has steadily fallen since the referendum - by around 100k pa - partially balanced by an increase of 40k pa from the rest of the world.
And, finally, there has been a small but steady increase, of around 20,000, in the size of the civil service, sharply reversing the previous trend.
Note: The numbers are 'full time equivalent'; in other words, those working half time count as 0.5.
As of September 2018, economists at UBS Group estimate that UK GDP is 2.1 percent smaller than it would have been if the Brexit vote had gone the other way. This is consistent with the difference between actual GDP/Hd and the green trend line in the first chart, above, which assumes that GDP/Hd might otherwise have increased by 2% pa from June 2016.
The slightly more pessimistic blue line assumes a continuance of the weaker GDP performance from 2013-16. Either way, actual post-referendum performance has been noticeably poor.
The notorious pre-referendum Treasury forecast was that the GDP shortfall would be around 3.6% by now - but that assumed no policy response by either HMG or the Bank of England. If the outturn figure is in fact only -2%, the improvement will be, at least in part, due to such policy interventions.
GDP/head is a much better indicator than GDP, as the latter is strongly influenced by population growth, including from immigration. Indeed, immigration has probably added around 16% to UK GDP since the late 1980s - around 0.5%pa.
The effect of increases in GDP/head on wages depends on how changes in national income are distributed over time, This in turn depend on tax rates, benefit levels, and other policy decisions. If wages fall faster than GDP/Head, it means that others - such as investors - are doing relatively better. And vice versa, of course.
A September 2018 Resolution Foundation blog provides an excellent overview of the performance of the UK economy since the 2018 financial crisis.