They are definitely the dive spoilers from under the tailplane…I finally found a photo tonight that confirms it.

Interestingly two different sizes were used on each V1 with the larger one under the port tailplane and the smaller one under the starboard tailplane (hinges to the rear with the squarer side inboard).

When the air-log propeller on the nose of the V1 had measured the required range an electrical contact was made that fired two detonators that locked the elevators in the neutral position, severed the compressed air supply to the rudder servo and allowed the two spoilers to drop below the tailplane to initiate the terminal dive.

That is quite a collection you have there…from at least four different V1 flying-bombs!

Thanks for all that, I agree, definitely spoilers.
They are indeed painted in the camoflage scheme of the aircraft.
I have a box with all kinds of other goodies from these V1s. What makes them quite nice is that they were picked up at the time and are labelled where they crashed, with little or no corrosion.

The late Dave Brett gave the box to me a long time ago, I don`t know where it originates from before he had it.
I must get it all into a display case and in the local air museum (Solway).

Finally, the youtube clip is really something. I have been told how loud those small pulse jets are so this one must be something else!
I assume he built it from scratch.

Thanks again

Pete