Hmm, so when is a drone not a model then... I assume that the comment "under 7KG" meant over 7kg... I bet there are some RC models out there that are more than that?
Kev.
If a model helicopter is used for the purpose of "aerial work" in the UK (whatever it's weight), then a permission must be obtained from the CAA. If a model weighs more than 7Kgs, then it is classed as an aircraft and an exemption is required from the CAA .