Thanks olbanjoplayer.
After reading the regulations regarding Sky Lanterns, it looks to me that if anyone releasing even one Sky Lantern must
contact ATC.
If anyone releases more than ten, they should contact the CAA.
This is the relavant section from the document.
"CAA / Directorate of Airspace Policy
CAP 736 / Operation of Directed Light, Fireworks, Toy Balloons and Sky Lanterns within UK Airspace
Chapter 3 Light1 (Temporary) and Firework Displays, and
Helium-Filled Toy Balloons and Sky Lanterns Release Guidelines
5 Guidelines for Helium-Filled Toy Balloon and Sky Lantern Releases
5.1 While the geographical zone described in paragraph 2.1a) and b) above does not apply
for helium-filled toy balloon or sky lantern releases, the CAA will usually consider
placing restrictions upon the request for such releases as follows:
a) within five nautical miles of an aerodrome for helium-filled toy balloons; and
b) ten nautical miles or less from an aerodrome for sky lanterns.
NOTE: All applications are considered on their individual merit.
7 Additional Guidelines for Sky Lanterns
7.1 The following guidelines are to be observed for the release of sky lanterns:
a) Any individual or group releasing more than ten sky lanterns should contact the
CAA prior to release.
b) Any individual or group releasing ten sky lanterns or less at a release site ten
nautical miles or less from an airfield – the EO should contact the ATC organisation
of that airfield.
c) Any individual or group releasing ten sky lanterns or less at a release site more than
ten nautical miles from the nearest airfield – contact with the CAA/ATC is not
required.
d) Sky lanterns are not to be tied together.
7.2 If the sky lantern release is planned to take place on or near the coast, the EO should
pass all the relevant details to their local HM Coastguard prior to the event.
NOTE: On contacting the airspace specialist within the CAA he/she will offer details of ATC
Units likely to be affected by any notified sky lantern event. The provision of such
details does not absolve any EO from identifying any local airfields affected by the
proposed event and is not to be taken as a complete list."
Mike / Speedbird