The non-pound in your pocket

Reading today that the pace of fakery in pound coins is picking up, I've long viewed a pound coin as of dubious value. Apparently (how do they measure these things?), 1 in every 36 pound coins is now no such thing, up from 1 in 40 just last year. I'm sure in Gillingham it is 1 in 3. Whenever I giftaid my church donation I am loath to put pound coins in the envelope, preferring either a mixture of silver, £2 coins and notes or simply just notes - it's getting to the point where I'll probably just go electronic from next year.
The only thing these 'pound' coins are good for is to release supermarket trolleys from the chain lock. I simply don't trust them for any other purpose. Redenomination is the only way.