Yep 80-84 quid for the pair, it maybe closer to 84 is you have posted as well.
I think when everything is changed it all goes hand in hand as everything is new, I hear
power flex arb bushes help but my oem ones where shagged and there has been a 1000% improvement as I did it all at the same time.
But Birchdown recommended doing them I fully trust them in there information (as they both have/had RS Clios themselves they treat ever car they take in as there own plus they know there stuff
inside out and backwards!