If i recall correctly, this was discussed last month on another website. It only relates to how opticians can claim back the VAT THEY paid & not we paid. I seem to remember that Specsavers stated that they had no intention in passing it on to their customers.
It looks to me as if it's the vat we paid them and they paid over to the revenue then. It now appears that they needn't have charged us part of the vat. But do you think you'll see opticians' prices falling now?
This should be a nice little earner for opticians. I hope they get interest on the monies overpaid.
In all honesty, it should not be difficult for them to id their living customers and refund.