Looks to me that an Interbank rate of about 1.18 and cash at about 1.169 is pretty much the norm for the foreseeable future - possibly the distant future.
Currency traders are a cynical lot - they didn't respond to Theresa May's latest profound analysis ("I want a red white and blue Brexit") by rushing out and buying Stirling.
I suppose I'm old and cynical, too. It if weren't so serious I'd be rolling in the aisles. It's like an episode of Dad's Army in the sheer ineptitude and vacuous pomposity of it all. (Come to think of it, it was the Dad's Army generation that voted for it). I can see Captain Mannering standing on the White Cliffs of Dover brandishing a dummy rifle and intoning "Don't worry Pike - they need us more than we need them." To which Sgt Wilson replies "As a matter of fact, Captain Mannering, that's not true. Our exports to the EU represent about 12% of our GDP and EU exports to us represent about 3% of EU GDP." "Quiet, Wilson. Don't confuse the men!"