I liked this one as it was a good story you could follow and just enjoy. I also LOVE mysteries being solved satisfactorily.
Usually War stories get a bit technical/boring as they meet hardened fanatics of the subject, but it was kept at the lowest common denominator in this episode, which made it followable/watchable - as well as being non-specific about battles.... also, never thought about how the trenches appeared, I just assumed the soldiers dug their own.
Coming from a long line of b4st4rds ...

I'm always amused by the concept that there was "massive shame" in illegitimacy in days-gone-by as my own tree experiences have shown that they all had them and everybody stuck by each other and kept them. Most women in my maternal tree had a child, then got married 1-2 years later and still kept their children.
The issue with Cheryl's family was probably more about an age difference maybe, and/or other personal issues they had regarding personality clashes and perceptions of intent. e.g. did they think the young girl was "too young", or "a gold digger". We don't know how well off the old fella was. Being a housekeeper and sh4ggin' the widowed boss was pretty much the norm (else I'd not be here from my paternal side rumours would suggest)......
Enjoyed it anyway as I could follow it. No heavy going bits; no really boring bits. Also, there were tidbits of new information to add into the knowledge banks.... e.g. I didn't know a Master Mariner was a Captain and they had a ticket, which was a bit of paper, they studied for!
I've no mariners... but if I ever find one I'll know that much now.