What plant is this? It looks like the leaves are quite dense and would keep the weeds out as well as having the pretty daisy-like flowers. A perennial?

I am really struggling to find out what this plant is..... the nearest I have got to identifying it is an aster...... but I am still unsure.....
Any confirmation /. ideas???

Looks like a Michaelmas Daisy "Aster spp" 2me:/

The flowers are purple/ lilac / lavender.... with yellow centre ... nothing like these.... http://www.bbc.co.uk/apps/ifl/gardening/queryengine?config=plantfinder_db_simple&templatestyle=plantfinder_fuzzy&page=1&sort_1=genus&sortsense_1=ASC&sort_2=species&sortsense_2=ASC&sort_3=cultivar&sortsense_3=ASC&attrib_1=common_name&oper_1=eq&range_start=1&range_length=10&val_1_1=daisy
Wish I could name this plant, it driving me mad!! :-/