>
> Er, given my experience of public transport in Australia, New Zealand and
> the UK, three countries where change is routinely given on board street
> public transport vehicles, the operator would be delighted to accept my
> $100 (or £100) note for an 80c (or 80p) fare.
>
> And give me the change in 20c and 50c (20p and 50p) pieces.
>
English £100 notes don't even exist. Scottish £100 notes are legal
tender there, but doubt anywhere much would accept them. Counterfeiting
is such a problem that many places (particularly in Northern England)
don't even accept £50 notes. When I went to the East Lancashire Railway
(steam and preserved diesel) I missed a train because they don't accept
£50s, and I had to find a shop that did!