Alouette 2
As a youngster in the 70s, an Alouette 2 landed quite close to our house on the Isle of Wight in preparation for filming a Martini advertisement. It spent a week or so chasing power boats up and down the Solent and sure enough a few months later the ad appeared on TV (great theme tune ''anytime, anyplace, anywhere, there's a wonderful drink you can share'' etc etc. Though never could figure out if anyplace and anywhere were different in an ad man's mind!)
Certainly do not remember the registration sorry to say, but the sticker on the nose was what looked like a bee or a hornet in a roundel of some sort. Funny what remains in the grey matter afer so many years.