Well Kendall me old mush. Wotcha gotta do in Blighty ter get yer letters an stuff sent furst class is ter put TWO stamps on 'em. That confuses them buggers in the 'oly ghost orfice and they think it's first class 'cos yer ad ter use more an one stamp.

If yer only use one stamp then they think it's second class 'cos yer could only afford one stamp.

Quite lorgical reely.