Basically, if you are the public you have pretty much been stitched up unless it is about a directly-elected Mayor or a neighbourhood plan:
“With the exception of a referendum on governance arrangements (mayors, cabinets, and committee systems – see section 4), no power is available to local electors either to force their local authority to hold a referendum, or to oblige it to take any particular action following the result of a referendum.”
East Devon Watch 