OK - so this is quite frankly a self indulgent love-in of an update.
Family stepped up and had the DCs for us. We had THE TALK.
We have an idea about how to change some of the logistics.
DH is looking to change shift patterns/and or job (depending on work availability)
He's only going to the gym from now once I'm at work. This will leave the 2 evenings free. We're going to either get a babysitter and go out or make an effort to eat at the table with a proper dinner once DCs are in bed.
He did say he thought things could be better, but felt all the long hours were necessary for the future (we don't own a house yet). I also emphasised how little time I have for myself, and we need to make time for us (and me), by asking for more help from family/babysitters.
Went out shopping, had dinner, laughed ALOT. Proper belly laughing. Jeez I've really missed that. Came back and I jumped him

I didn't know I had it in me!
Anyway, it's all good. I was very aware of our shared history, how much we've gone through, and how well we get on when we're together.
I also didn't realise that he does have more of a grip on current affairs/my job than I gave him credit for.
That's all for now. Thank-you all for the advice. I'm off out again with my D H