thud or knock

Strange issue which could be anything but will ask anyway just in case Recently I've noticed when I come off the motorway, stop, then accelerate away (medium throttle) there's a thud Feels like something at the front of the car and I've cleared the boot just in case something was rolling but...

In the past 6 months my rear end has had new RTAB's, shocks, top mounts, coil springs, ARB bushes and drop links (with brackets). Now I get a loud, dull thud/knock from the rear end when turning at low speed or when bumping up kerbs etc. It's especially noticable when turning right into my...