The message
from Andy Hall contains these words:

St Emilion? Is that like Tesco's own label claret but at 20 times the
price?

It could well be, although generally if something can be sold as a
specific thing, it is.

I was given to understand when I was but a youth that if it actually
said 'claret' on the bottle it probably wasn't, but that was before the
advent of the Trades Descriptions Act. :-)

--
Roger Chapman