Rioja offers are two a penny currently but not all of it is as classy as the Rioja Perez Burton 2007 from Marks & Spencer which currently has a 20% discount on all Spanish and Portuguese wines. That brings it down from £9.99 - already a fair price - to £7.99 and if you buy three bottles you get a further 10% off (£7.20).
It's made by the respected Spanish winemaker Telmos Rodriguez and has a light, graceful, less woody character than many riojas being aged in French rather than American oak. I really like it.
There were a number of other wines that tasted promising but I can't totally vouch for them because they only presented tank (unbottled) samples at the tasting. But I'd have a punt on the vivid fruity Garnacha Tinto Navarra (£6.99 reduced to £5.99 this month)a modern Spanish red which I'd serve chilled and a very decent young Valdepomares Rioja Blanca (2010) - normally £5.99 down to £4.79 until July 3rd. Particularly impressive as it's made without chemical fertilisers or pesticides.