BAe Jetstream Jetstream T.2

Fourteen of the Royal Air Force Jetstreams were modified for the Royal Navy with a different job: training rear crew, the observers who handle radar and tactical coordination aboard shipborne helicopters. The aircraft offered exactly what was needed — endurance, a pressurised cabin and room for several working stations — without the cost of flying a helicopter.

The Fleet Air Arm kept them in service until 2011, eight years longer than the RAF kept its T.1s, which makes this the longest-serving variant of the Handley Page lineage. A batch of ex-Royal Navy airframes later passed to the Uruguayan Navy, which retired them in 2010.

Two T.2s are preserved outside Britain: one at the Flugausstellung at Hermeskeil in Germany and another, more improbably, at a leisure park in Voorthuizen, in the Netherlands.