Iainhol: With respect, a Canadian pilot can fly into/out of the UK until he/she is 65.
The age 60 rule is being promulgated by ALPA to encourage older pilots to retire and allow the younger generation to fill the seats.
As American pilot ranks get rapidly depleted over the next 5-10 years, ALPA can be expected to revise their commitment to the Age 60 Rule. Once this happens, the FAR's will follow, probably with a 10 year lag. Currently, I as a pilot licensed in Canada may overfly the USA, but may not land and then take off again on a commercial venture once past my 60th birthday.
As go the FAR's, so go most of the world's regulations. Time for a "wake up!" folks. It's the 21rst Century!!