I know that sound, your strut top bearings are ****ed mate, if you get someone to turn your wheel while you watch your spring you will most likely see the actual spring move. Mine **** emselves because i had dodgy springs in it apparenlty, (I didnt know that till my mechanic told me) he put a new one in and it lasted avout 12 months, I pulled the struts out last week and the casings were split, Just get two new ones, a two hour jub at the most and its done.
Mine didnt last because apparently my springs didnt have the additional tracking coil to hold them in properly so the strut top bearings were constantly getting bashed.