UK Laws
Have a good read of CAP722 - Unmanned Aircraft System Operations in UK Airspace – Guidance.
Google have an awful lot of rules and regs to comply with if they have designs on using these things to do extensive mapping of the UK. I'm sure most of the civilized, sorry that should be bureaucratic - world has similar rules and regs.
Oh and @Fred4 - in the UK at least the answer to your initial question would be none. As above, so below. You have no rights to mining on your property either. Ask Al Fayed. ;)


