Rover owners: possible kv6 head gasket failure??

ok another issue with the zs180 started hearing a very audible loud clicking thought it was just the purge valve heard this a few times before and could feel it,
but this time it lasted a little longer than usual just after starting it up from cold , but it was coming more from the vis motors side but couldnt really feel any vibration coming through them either doesnt, sound like the inlet valves neither its definetly clicking not metalic ,
so thought i havent checked the oil in a while i did change that 3500 miles ago ,when i opened the cap i was greeted with mayo as it called on the inside and my coolant has dropped alot have topped it up twice the past 1000 miles or so and the expansion tank is nice and clean no oil residue in there,
around the head next the the radiator and on the heat shield it is visble something has been leaking out as you can see the run off the heat shield and the head looks like it misted with oil , its not dripping on the ground when parked ive uploaded a video so you guys can see what im talking about ,the two bolts on the left of the head were about a quater inch loose as this seems to be the side thats leaking, but i doubt its gona be that simple my gutt is saying hgf