Blown head gasket, likely cause????

I cant say for sure, but I think those spots in the pic are droplets of coolant. To Be 100% honest it's actually My dads motor. And he lives 40 mins drive from me. So I asked him to email me some pics, after he rang me today.

I'm hearing what you're saying about the cylinder next to the blown cylinder. However cylinder number 2 looks worse. Although not as bad as poor old number four.