I popped in my local Superdrug and they had boxes full of various sunglasses (all with UV protection ratings) for only 49p
If people don't want to use them, they can always give them to their kids for their 'dressing up' box.
The pair I picked up had a £9.99 sticker on them and also came with a soft pouch and cleaning cloth - handy to just keep in the glove-box as a spare.
The pic I posted is of a pair that look "very similar" to the ones I picked up - I didn't pick up a pair of Prada glasses (before people complain!).
Hope someone can benefit from this deal.
These were in Sheffield "The Moor" store.