12" Tannoy Red. Worth anything?

Yes they are valuable. Go to eBay for more info.
The label that can be seen in the second photo indicates that they are 15" drivers, not 12". Which are even more valuable. If the cones are original and in good shape my guess is that they are worth somewhere between $5K and $10K for the pair. With the great majority of that value being in the drivers, not the cabinets.

-- Al

Worthless garbage, very hard to dispose of.... but if you FEDEX  them to me, I'm willing to help you and take care of that for you!   :)

...Yes, the drivers, you've found some pretty valued hardware.