[peterstjohn]

Here's a documentary that was broadcast on BBC4 a couple of months ago about Bond and his quixotic journey to get HOTOL/Skylon into the sky:

http://www.youtube.com/watch?v=vZ_a21fPkYM

It includes a test-firing of the new heat-exchanger at the end.

[timthorn]

One of those truly inspirational stories, where people dedicate their lives over decades to an idea and see it through. Granted, their aircraft isn't yet built, but they're well on the way.