There is zero protection
Yes that's right, we are getting screwed by the exchange rate and these trends can take a decade or longer to revert back. Sadly I don't think it will revert to 5.85 until the next major recession or until Labour win an election, whichever the sooner!
Hopefully FZ will recognize this but they are happy to skimp on the housing, pension, education allowance, crap staff travel, the fact that your wife is unlikely to find work......