Raggytash:
I was responding to your request to show that anyone other than Iains believed the pound was previously over valued.

The link I gave showed the opinions of the IMF & the Governor of the Bank of England.
That link was dated 17/10/16, since which time the pound has recovered a little of its value (at 17/10/16 1.106), and constantly traded above that level, apart from a short period in August 2017.

I accept that the value fell after the Brexit vote, but that was because it was overvalued anyway. The Brexit vote just provided sufficient instability to make it an ideal opportunity to re-adjust.