Car judders when under loag going up hills, i have been told its the centre bearing on the propshaft, i was thinking it was the gearbox. Could anybody tell me if this sounds plausible.

A judder under load up hill is often a sign that the torque converter lock up clutch has seen better days. What variety of RRS do you have, how old and how many miles has it done? 2012 SDV6 - it's missing a couple of cylinders
2008 TDV8 - it was a labour of love and is much missed

Hi Its a td6 2.7 2006 with 133k miles on it

It's easy the check the centre bearing, to be sure. A complete replacement rear prop is about £295, so not too bad. It's an easy DIY fit too.