exact same thing happened to me, except my HG's were leaking AND the O2 upstream was bad. check out the picks in this thread.

https://landroverforums.com/forum/di...acement-42905/

 

holy cow man that is crazy how much alike our pictures look. Supposedly a head gasket job was done last year sometime but after seeing your pics it really makes me wonder. My pics and symptoms see EXACTLY like yours. I took my motor apart cause of a bad knock which turned out to be a bad rod bearing. Seeing your photos makes me think bad head gasket as well though.