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Fixed broken link.

the leaves, what do scent do they have ?
it also looks a bit like Caryopteris x clandonensis....

Aswhad,
Thanks for you response.
When crushed, the leaves and stems have a cool mint scent. I don't think this is a Caryopteris because their stems aren't square, like members of the mint family(Lamiaceae/ Labiatae ). My plant has square stems.

Its also got a Salvia farinacea look about it.

I don't think this is Caryopteris. But just for info Caryopteris is actually a member of the Lamiaceae. They don't all have square stems.