In reply to garbage:
On Cotswold outdoors website they had a DMM proWire (20cm) for £ 8 each. I ordered 6, but they were on sale.
Also, the main climbing shop in Hathersage (Derbyshire) has a WIldCountry Trad Pack 5 quickdraws for £ 40 ( £ 8 each), but they may have run out by now (visited the Peak District on Easter day as I was in the area and grabbed one 5-pack on the fly).