I believe there may be a problem with the CAA regarding "Fast Roping" authorisations etc, but mainly because as far as I am aware no application to do so has yet been formulated. The machines were purchased with a view to the future not necessarily today!
I am unaware of any night restrictions such as you suggest & would be surprised. But will follow up.
New enterprises such as this will always be subject of such rumours, often from those with an axe to grind!
Tigerfish: