Is an Ur-q I5 an interference engine?

["Jim Haseltine" <Jim@ur-q.freeserve.co.uk>]

I know that this question has been asked time and time again in this forum,
but would anybody like to hazard a guess (or two) as to how much damage
there is in my engine?
Current situation is that the crankshaft Woodruff key sheared when the
engine was pulling some 6000rpm and car was travelling at close on 100mph.

Go on, take a guess - there's no prize, no cash, no Kudos.
How lucky have I been?
I already know 'cos I've just pulled the head.

I'll post the answer later....

Jim Haseltine