What does a radar look like when it merls?
There were two Blue Kestrel trials Sea Kings - XZ575 (I think) and
ZB506. (Other pics
here)
The former had an orange painted cockpit and other bits, and was the initial development aircraft flying initially out of Yeovil with some forays to Boscombe. The latter was raspberry ripple, with the RAE originally out of Bedford and later Boscombe.