The oil filter vibrated loose (thankfully as we just left the pits) and dumped half the contents of the sump on track before we spun on the oil deposited on the tyres at a leisurely 20mph. Richie (sailor boy) jumped in to help and screwed it back on, but the seal had come out of the resess, so when we started it back up, it was still pissing out.

Luckily with it still being only 4.40, Ben went into town, got oil, filter and filter ratchet from Halfords (as Richie had done the other one up so tight, he couldn't undo it again ), and it was all put back together and I was able to drive home.

I just want to say a big thank you to everyone who pitched in, as it meant that I didn't have to worry about anything:
Richie fixed it
Ben (Gatecrasher) went and got all the parts
Nathan, Paul and RichPON all waited in case I needed a lift home.
Absolute stars the lot of them .