Cylinder head is off

I have now completed the job of taking the cylinder head off. I am not sure what to make of it, but the head gasket has some damage. I am not sure if that damage is what caused the breakdown. I inspected the head, block and pistons but could not see any cracks or other damage. My next job will be to check the timing belt, but for that I need a special spanner to remove the fan, which I don't have. I have ordered the spanner from Ebay.co.uk and hope to get in the coming week.