▁operator ▁was ▁using ▁the ▁U AV ▁but ▁that ▁it ▁could ▁not ▁release ▁details ▁of ▁those ▁who ▁were ▁lic ensed ▁because ▁of ▁data ▁protection ▁legisl ation . ▁ ▁New ▁reg ulations , ▁including ▁a ▁registry ▁of ▁U AV s ▁over ▁ 1   kg ▁( 3 5 oz ) ▁were ▁introduced ▁in ▁December ▁ 2 0 1 5 . ▁ ▁Small ▁Un mann ed ▁A ircraft ▁( D ron es ) ▁and ▁Rock ets ▁Order ▁Stat ut ory ▁Inst rument ▁ 5 6 3 ▁of ▁ 2 0 1 5 ▁This ▁stat ut ory ▁instrument ▁prohib its ▁U AV s ▁from ▁flying ▁ ▁in ▁a ▁manner ▁that ▁is ▁a ▁ha z ard ▁to ▁another ▁flying ▁aircraft ▁ ▁in ▁a ▁manner ▁that ▁end angers ▁life ▁or ▁property ▁ ▁further ▁than ▁ 3 0 0 m ▁( 3 3 0 ▁yards ) ▁from ▁the ▁operator , ▁more ▁than ▁ 1 2 0 m ▁( 4 0 0 ▁feet ) ▁from ▁the ▁ground ▁or ▁out ▁of ▁line ▁of ▁sight ▁ ▁closer ▁than ▁ 5   km ▁( 3 ▁miles ) ▁to ▁an ▁aer od rome ▁ ▁over ▁urban ▁areas ▁ ▁over ▁crow ds ▁ ▁within ▁ 1 2 0 m ▁( 1 3 0 ▁yards ) ▁of ▁any ▁person , ▁structure ▁or ▁vessel ▁not ▁under ▁the ▁operators ' ▁control ▁ ▁over ▁military ▁bases ▁or ▁pr isons ▁ ▁in ▁civil ▁or ▁military ▁controlled ▁air space ▁ ▁The ▁operator ▁of ▁a ▁U AV ▁of ▁between ▁ 4 ▁and ▁ 2 5   kg ▁( 9 ▁and ▁ 5 5