Roland Perry wrote
on Sat, 26 Feb 2011, remarked:
A very good question. I suspect they'll have a slogan like "Travel
on the tube with Mastercard, if everyone in your party has one;
For
everything else, there's Oyster".
Children with credit/debit cards? Doesn't sound likely to me.
Whoosh! (They are the "everything else".)
Debit cards for the under-age, no credit history, don't trust
themselves etc do exist.
Solo is one.
They are designed to be unable to create an overdraft so can't be used
if the bank link isn't operational - no falling back to signatures &
multipart forms with embossing machines during a power cut.
However they are probably not allowed for wave and pay applications.
--
Mike D