Good point!
There's going to be masses of examples like this though. . . .
Retaillers will be obliged to reduce the rate of VAT that they charge next week - no choice in the matter - but its entirely up to them whether to reduce the price to their customers or to leave the price unchanged and increase their margin. I'm VAT registered and haven't received the written notice yet (obviously!), but I know that the Treasury believes that the benefit of today's VAT announcement will work for the nation's economy either way. If the retail prices are reduced by 2.5% then consumers will have that little bit more to spend elsewhere (and we all will, won't we?), and if prices remain unchanged, then retaillers have 2.5% more to spend on their costs (which includes employment of course - and they will spend it too) and the one thing the government will NOT want is more unemployment.
BTW There's already an anomaly in charging VAT on car parking: Assuming an authority charges in round numbers (such as £1 per hour), then they will have to pay the gov't the 15% VAT for all income from those tickets for parking in their car parks; BUT, they can pocket that 15% from the same rate ticket for parking on metered bays on their roads. (VAT cannot be charged for parking on the highway).
I won't go on about it now, but for once, despite all the critical press which has had 3 days to research and prepare for this, I believe the Treasury has got it right! The small VAT reduction will make the country's many poor people spend more very quickly, and make the wealthier re-invest in the markets - winning either way.