Knocking from r/n/s
 

As above, i have very recently developed a loud knock/bang from the r/n/s of my 96 WRX.
I have removed all the crap fro the boot, so can eliminate that.
I had the shocks and springs changed, as well as solid rear links done before xmas and the problem has developed since then. This is not aimed at the company, who did a great job (i hope!).
Seems o be most obvious on tighter corners or pot holes etc.
Any ideas?
Thanks