Honestly, I would just give up the added stress of being annoyed at the one taking action.
Would you rather he was rushing along to his own timescale? I bet not!
Look, you want to separate anyway, so this is a good thing.
Don’t see it as having the actions dumped on you, but as you having control of a really critical situation.
Don’t worry about the £1000 valuation for pensions in payment for now.
Start with getting together a list of all your marital assets. There’ll be plenty of lists online, but house & pensions are your biggies.
Get 3 estate round to give you a valuation - just say you’re considering downsizing for retirement. Average them. You can have that done on your next day off, it’s not hard. (Practically, I’m not dismissing emotionally!)
Get your own CETV application for pensions not in payment off.
Get a list together of everything you need from him. If it’s like my marriage, you may be able to just go and get most of it yourself. My XH had some shares - but guess who filed the annual statements?!
Get it all listed.
Decide what YOU want.
I guess given your ages, 50%.
Decide whether you’re interested in buying him out partly by letting him keep all his pension - doesn’t sound like you can, but make your decisions and COST THEM without him.
I did all of that for my divorce, he did fuck all. I didn’t care - far less stressful. I just presented him with, “this is what you need to apply for, this is how I propose to split it.”
Let him start actions then.
ENJOY having the control at this stage!