Hey people, I'm after some advice...
When we put a key in the ignition and then start the car we get a bulb (or light) symbol come up on the display... Not all the time though, what is this?

It's probably telling you there is a light bulb that it thinks has blown - the symbol changes depending which bulb it is, so that should pin it down. My rear fog started doing this, but would still light up, so I took the bulb out and put it back in and, hey presto, no more bulb warning. Presumably a little bit of corrosion on the contacts got wiped off by refitting the bulb.