Revised stamp denominations
I propose that the Royal Mail scraps all stamp denominations that are not powers of two. So the only stamps available would be 1p, 2p, 4p, 8p, 16p etc.
You’d only ever need a maximum of one of each denomination on any letter or parcel. For a 39p first class letter, you’d affix a 32p, 4p, 2p and 1p stamp. And for a 30p second class letter, you’d go for a 16p, 8p, 4p and a 2p.
What do you think?