Having consulted the RHS Gardeners Encylcopedia it definitely looks like a member of the perennial Iris family. Each flower generally has 3 large petals and 3 smaller standard petals. One of the groups is Rhizomatous (reference to the root stock as opposed to Bulbous) and these have "sword shaped leaves usually in a basal fan". That seems to describe your specimen. Rhizomatous type can be bearded, beardless or crested. I cannot identify the exact variety you have though. 
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2002 D2 S8 Ming Blue, Valcona leather, Vavona wood insert, solar sunroof (to be fitted), Heated rear seats, extended leather pack, 18 Avus, ski hatch, Bose, auto dim rear view mirror, rear blind.
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11th June 2017, 04:31 PM
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