Before revision: United Kingdom Unlicensed aerodromes in the United Kingdom often recommend pilots communicate with each other using SAFETYCOM, currently 135.475 MHz.Uncontrolled Aerodromes — Communications — SKYbrary Aviation Safety, retrieved 2018-09-19 .
After revision: United Kingdom Unlicensed aerodromes in the United Kingdom often recommend pilots communicate with each other using SAFETYCOM, currently 135.480 MHz., retrieved 2019-09-30 .