I assume you are well aware that all "kerb dropping" had to be done by the local council (at exhorbitant cost of course) - no DIY allowed ! Having a VM owned manhole cover might complicate it of course - but I think it will be the least of your issues - I would check what the council say asap as this must not be uncommon for them. See link for the legal view - which I think is quite pessimistic http://www.wilsham.co.uk/dropped-kerb-law-and-drop-kerb-applications/
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