Hi All. Thought I would report back after my initial post. I took on board most of the advice above as well as (on the advice of a mechanic at MMC) greasing the mating surfaces of the bonnet catches. Hey Presto! Squeaking noise gone!
To say I was pleased is an understatement. I cannot definitively state which measure did the trick but in combination (cable management aside) the noise has been completely eradicated! Hallelujah!
