You could try asking here at:- http://www.luftwaffe-experten.co.uk/index.html
mmitch.

I have always found this strange. The National Trust (and others) stopped photography on security grounds. Alarm systems and valuables could be identified in advance for planning a robbery.
Hawkinge used to be a more friendly place with someone on hand to answer questions. 2 years ago there was just one person on the entrance. I suppose they don’t have enough volunteers. Perhaps one follows another? 🙁
mmitch.

On seeing this Luscombe Silvaire at Abingdon.
” My dad flew these, they were practically built in our backyard”
Some ‘homebuilt’ 🙂
mmitch.

I have used both film and digital cameras on several different domestic flights in the UK. All the cabin crew seem interested in is whether it is secure and not likely to hit someone in an emergency. Surprisingly an organiser like a Psion does give out quite a bit of interference. Try a scanner receiver on an ATC frequency and see how much the device interferes. One may not matter to an airliners electronics but just imagine 100.!
mmitch.

The Lanc was at Woodall Spa and Kelstern on its own and New Leak, Blackpool and Elvington with a Spit and Hurri. These details are on their website at:- http://www.raf.mod.uk/bbmf/displaydates.html

mmitch.

By definition a warbird is an ex-military aircraft that was in front line operational service. In motorsport they have categories that are also defined by a ‘latest year.’ So that if a warbird is defined as eg. in military use before 1980 then that date advances each year. This will include more jets.
Then of coarse there is the added problem of a ‘restored around a data plate’ aircraft! It’s a can of worms!
mmitch.

On the wall of names at the US Cemetery at Madingley, Cambridge, UK there are some of the US Coast Guard. Would they have been on Air Sea Rescue?
Perhaps around the D Day period?
mmitch.

Cees
I am certainly not qualified to give specific case details of recovery ‘difficulties’. Von Perthes and others probably can.
But I have certainly read of cases over the years where the ‘authorities have tried to stop a ‘dig’ and then when it has gone ahead a pilot has been found.
British law does require that a body is reported to a coroner who then decides if further investigation into the death is required. It is also an offence to conceal a body, which perhaps is why some ‘authorities’ don’t wish a recovery to proceed?
mmitch.