Sorry I didn't reply to you guys earlier, I dunno why the thread didn't show-up in my subscribed threads list.
The timing was done electronically with a couple of sensors I believe at the start and finish. There wasn't a speed trap, so no idea what my MPH was, but I will venture a guess...it must have been around 180 Km/H or so, because I'd just shifted into 4th gear before the 1/4 mile, so that would be around 113 MPH.
...and yes, I had *obviously* run a fair few Kms before doing this!