Thanks Hughes500, all that makes sense and clearly I'm hoping that we wont get near to that obviosuly.
The difficulty I currently have is
a) identyfying the current legislation that technically allows us to land and
b) convincing the General Manager that it's basically no big deal (particularly he's allowed me to hover over the proposed landing area within his grounds and I've landed at 3 other hotels in the last 3 days without a problem!)