[gcarm]

I had some heat shields on each side of the engine which I have now removed. This seems to have lessened the amount of heat being deflected up under the bonnet. So I think I don't need to do anything further as the bonnet temperature seems more acceptable now.
Regarding the engine temperature, I found the temperature gauge is reading about 10 deg hotter than the temperature reading from the PCM. Not sure at this stage why? Either the gauge is inaccurate or it is due to the position of the sender's. The temp gauge sender is on the rear of the right head whereas the PCM sender is at the front of the left head. Next step is to get another gauge to see where the inaccuracy is coming from.