(Softers) Internally, railways still use chains and I don't mean the bit joining old loose-coupled goods wagons. I think we should remain Imperial because the words are part of the language and culture. Sixteen tonnes and what do you get? Deserved mockery.

[Software] Deep down, I know that standardisation is right, but I just simply love old Imperial measures (and coinage). A friend of mine who runs a flower wholesale outlet spent an entire day last week quoting all prices in old money, for fun. He didn't restrict himself to pounds, shillings and pence, oh no...tanners, florins, guineas, crowns, half-crowns and farthings were all brought into play. It made his day go by much faster.
There's a wonderful list of unusual units of measurement at one of my favourite websites, Phrontistery, which includes the dalton, the darcy, the footlambert and the face-cord. For sheer frivolity, I try to incorporate some of the words from that site into conversation, so I think it's quite easy to see why I want to cling on to Imperial measures.

(Phil) What about the threepenny bit, everyone's favourite coin in those days? There's even a building named after it.

My infant school, which was attached to the junior school I also attended (built in the 60s, I think) had a hall shaped like a 'thrupenny bit' and was known locally, for a time as 'The Thrupenny Bit School' to differentiate it from the junior school buildings, although there's no reference to it on Google, as far as I can find. It was Lacey Gardens Infant School, if anyone is interested...

[Rosie/Phil] Despite over two centuries of metrication the French still use old measures if you are worried about their eradication from the culture. They often use puce for inch, livre for pound (weight) and of course the demi for a half (pint).

[Software] Indeed, on a few occasions in France I've forgotten about that and have asked for a demi when I wanted a half-litre of beer.

(Softers) I know. Did you mean pouce? :-)

[Rosie] Oui.

[penelope] A pre WWII threepenny bit, or a post-blackout one?

(SM) Few people, even of my age, have seen the silver threepenny bit. I was once given one as change by a bus conductor about 1953 but had to spend it to get home, or walk two miles. I have found another one (1920) in my heap of old coins. They're tiddlers, 5/8" across. The chunky version was around in 1940, as I have one, and two more from the sixties. They're nice. Equivalent in the fifties to about 30p in today's money.

My mum used to have a few for sprinkling in the Christmas pud; although I can't remember ever seeing them in circulation. Here in the Channel Islands we had our own 3d bits. In Guernsey they were nickel silver with a scalloped edge and in Jersey they were round. The latter reason was why we never had 3d slots on our pay-on-answer paypghones.

I can just recall the silver threepenny bit in the Christmas pudding, but I think they'd all been lost by my adolescence. I don't know about the buying power of the dodecagonal version, but I can remember being able to buy a poke of chips for 3d around 1960.

In 1960, 3d was the standard child fare on an Edinburgh bus, 6d for adults. I remember my grandmother once showed me a silver thruppence, but I don't remember what it looked like. But here's a site with more info.