I've had the car off the road for the last week or so waiting till I could do my brakes. The front was up on stands the whole time so it was tilted up a fair bit.

I've just gone to start it and it is spewing white smoke everywhere. I let it run for about 4-5 minutes and it dosn't look like letting up at all. Is this likely to be burning coolant? And therefore signs of a leaking head gasket?

What would be my next step? Compression test?

thanks