Hello all reading..... Had a knocking noise coming from rear end the whole time I've owned the car have looked and looked and listened and so on!!! Having a look over the engine Saturday found a fooking 10 mm spanner sat just behind the belt pulley!!!! It's obviously worked its way across and around the engine over time! Just thought I'd share this as you never know what may be causing the noises you us we can hear!!! Luck I found it when I did as could have obviously caused some majour issues! Gained a snap on 10 mm at least!