Sad news, tracking the news helicopter circling overhead right now. I agree with JJJ best not speculate into what no one knows right now.

Sky news photo shows wreckage of a white helicopter with an enclosed tail rotor.

https://news.sky.com/story/plane-and...shire-11130285

An aerial news photo just showed the helicopter wreckage; shows a white Fenestron of Eurocopter design.

EDIT:

I just had a second look at the photo (I purposely didn't say EC120 so as to not alarm anyone unnecessarily). It's not a Eurocopter; it's a very similarly-shaped "smaller" helicopter. Sadly, doesn't look good.

Don’t over react children. I got what he meant. He was saying poor weather was unlikely to be involved

The Mail is confirming G-JAMM

Helicopter and plane collide mid-air in Buckinghamshire | Daily Mail Online

Ident of fixed wing aircraft involved clearly visible on BBC News photo (not allowed to post links yet but check out the BBC News website).

Looks like the earlier poster was right. Similarly, the helicopter previously mentioned was crossing the same spot on FR24 and suddenly stopped. Very sad.

Indeed. The first question that seems to get asked on here, or the first opinion points at weather. The visibility today was perfect so it seemed worth mentioning before anybody not local asked or looked it up.

BBC photo now shows a photo of the crash site, the aeroplane reg is plain to see

The BBC aerial footage is concentrating on the tail section of a Cessna (172?) which appears severed from the fuselage.

WACG is a 152. Helicopter is a Cabri.

Heli crash site looks very contained from the pics

G-WACG Confirmed from photos of paint and now the Reg from overhead.

From the pictures it looks like a Cabri from Helicopter Services Ltd at Wycombe air park

It's notamed as a DANGER Area
not a Prohibition nor a Restriction
(the danger being midair collision presumably)

there is a warning PILOTS ARE FURTHER WARNED THAT ACTION MAY BE TAKEN ATANY TIME TO IMPOSE RESTRICTIONS OF FLYING REGULATIONS UNDER ARTICLE239
and a request (understandably) not to overfly

very sad for all concerned

Light aircraft and helicopter midair near Westcott
 

BBC reporting midair between a helicopter and Cessna here

Aircraft and helicopter in mid-air crash near Waddesdon - BBC News

Thread on Rotorheads here

http://www.pprune.org/rotorheads/602...waddesdon.html

We lost one of the industries gentlemen today.

God speed

We sure did. At least I managed to share a cuppa with him yesterday.

I'm afraid that registration is also visible on a photograph on the BBC website. It's a school aeroplane, so tells us nothing about who was on board.

Fixed wing aircraft have such a limited field of view, you don't want to end up near and beneath one. They will never see you so best to keep far away and to let them know you are around.
Hope they get to see another day, sounds like such a avoidable situation.
Training flights gone wrong?

Poor folks, it's sickening how easy this can happen and the enormity of the result.