[economics rant]
Hmmm... what would you have the 'clever people' do? Markets and (specifically currency markets) are driven by macroeconomic fundamentals. So, you want a sterling appreciation? Easy! That would require a nice big cut in government spending, and nice big hike in personal taxation, and a nice big hike in the central bank interest rate (i.e. a monetary contraction). So, assuming the Marshall-Lerner condition holds and this gives you your desired stronger Sterling, do you suppose you will have any money to spend, with fewer jobs, higher taxes and mortgage repayments that will make your eyes water, do you anticipate this will be a better situation?
Seriously, if you want to go back to 10% interest rates and a recession that would make the 1930s look like a minor stutter, then by all means implore the 'clever people' to do something...
[/economics rant]