I well remember - I have a thick skin, so must have the memory of an elephant!! - that Manchester use to charge a fee of 7/6 in old money back in the late '60s.
I'm obviously almost but not quite so old - I recall my parents having to pay 50p (10/- in your terms) at a Manchester check-in desk in 1971.
I've also come across travel by ferry to the Scottish islands where you are charged a "pier fees" amount in addition to the actual ferry ticket.
The thing about airport fees collected by the carrier is that airlines pass on an amount that bears no relation to what is actually charged. Quite likely if the Newquay £5 was done via the airline Ryanair would recharge passengers at £11.70 or similar.