I don't know what a particular warning light is. It came on today; it looks like a circle with little lines coming out of it. Sort of like a "light bulb" idea symbol.

It might be your tire pressure monitoring system. Try checking your tire pressures.

this means the brakes are low, have your brakes checked, hope this helps.

this sounds like the Traction/Stability control and ABS warning lights, they are art of the same system and come on together.

This is probably the coolant level sensor indicator for the antifreeze reservoir.

A circle with lines around it - depends where it is -
If its a top left light, then it should be a circle with an exclamation mark in the middle, and two lines running part way round the outside (1 to 5pm and 7 - 11pm). Thats the handbrake and brake fluid light which comes on for about 3 seconds when you start the engine ... if it comes on at any other time - seek help.
If its top centre, and has ABS in the middle, then its the anti lock braking light. Similar to above, lights up for a few seconds at start.

Muffler with lines coming off it - are they pointing outwards from the circle, (with a thermometer in the middle = transmission oil temperature guage), or are they on the left and all parallel (which would be main beam indicator, which lights up blue when on)

It might be that the tires are under-inflated mine does it too and thats what mine means

Semi-solved. It looks to be some sort of headlight warning. Fog lights?
I'm still investigating.

If it's round with a line down the middle, then it's a fault in brake system warning. You should check your brake fluid level.

sounds like the cruise control on light