I’d go into it in detail but, in the spirit of the saying that a picture can tell a story better than a thousand words, let’s just have a look at this graph instead (courtesy of @UKJCP on Twitter).
By my reckoning, somebody’s calculations started to go seriously amiss in November 2012.
What do you think has happened?
And who do you think is to blame?
Follow me on Twitter: @MidWalesMike
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