Car was faultless all day, then literally as we we're on the exit road it just cut out and wouldn't restart. Info centre was warning I was down to a range of 35 miles and was on the last 2 bars of fuel, so I figured the most likely cause was that the gauge was lying and I was actually out of fuel. The calvery showed up and Rachel nipped off to get me a can of fuel from a nearby petrol station.
Dropped that in, and it still didn't want to start; worse still the battery was now getting grumpy. So, Aaron and I pushed it out into the carpark, where fortunately there was a friendly AA man. How friendly? Well, I'm not a member but he was more than happy to try and solve a problem on a "real Volvo" (he'd just had to try and fix a C30, but it was a "computer required" job). We tracked it down to a combination of both no fuel, and no spark, which make me think crank sensor.
Thinking logically, given the amount of start/stop/clutch slip going on (my left leg is STILL aching 2 days later!), I'm thinking there may just be a big old build up of clutch dust over it.
Just need to find the time to do it now - Currently looking at 2 weeks time due to work; Rather annoying given that I've already paid for a month's tax for one day, and month two she's out of action!