Update Turn 16 South
The Sturmpanzer engaged the Churchill that has disappeared last turn but had no effect.
Only the top artillery plot has actually landed but with more units appearing in the area when the opportunity arose I decided to take it.

Started with infantry fire as some enemy squads have LOS to the ATG's, this drew fire from the Churchill & Sherman the other Churchill had just made the move shown.
We needed to neutralise the underlined squad otherwise the ATG's would be spotted for sure so continued with the infantry fire. Pretty sure the tanks only have 1 main gun shot so its worth the risk now.
The bottom ATG fired at the moving Churchill but it bounced as did the second shot, its 2nd return fire killed 2 men out of action for now.
Sturmpanzer moved unobserved as target suppressed & killed it with its 2nd shot.
The top ATG targeted the Sherman & hit on the second shot the Churchill returned fire all for no effect but suppression.
Can the MkIV enter the trees unspotted? Yes it can & kills the Churchill with its first shot. Next shot vs the Sherman goes wide & it fires the smoke dischargers.
Happy with that outcome despite the ATG positions being compromised.
Just 2 Churchills & a Sherman left that we know of & if they try advancing this turn it should end badly.