My pensions are paid into a UK bank account, so, to quote Harold Wilson, the 'pound in my pocket' is not affected by what has been effectively a 10% devaluation in the value of sterling, until I change it into another currency.
A week ago, one pound was getting me 50 Thai Baht; today it gets me 45. Let's hope it doesn't get any worse. Obviously, if I buy goods here with my UK debit or credit card, they'll be 10% more expensive when the bank does their conversion.
In theory, British goods should be 10% cheaper abroad, but the question is 'What British goods?' What do we make and export these days?
Anything you buy in UK which originates abroad is going to be 10% more expensive - in your case hotel accommodation in Peru, aviation fuel etc etc.
They've opened Pandora's box, and God knows what is still to come out
MK