UPDATE: Turns out they were actually suits used by the RAF

http://screenburn.kotaku.com/the-star-wars-costume-thats-recycled-from-a-doctor-who-1571401648

A while back I was re-watching the Second Doctor Who (Patrick Troughton) serial Wheel in Space. During the episode two astronauts show up and I right away recognized the costumes from Star Wars: A New Hope and Empire Strikes Back.

Wheel

The Costumes worn by the astronauts would a decade later be pulled back off the costume shelf and reused as the costumes for Boshek (A New Hope) and Bossk (Empire). Made for a cool little geek moment seeing that.

imagesbossk