With him staying with you as much as he currently is if you're claiming as a single parent you are currently committing benefit and possibly council tax fraud (if you get single person discount)
You could be in really deep shit if this comes to light!
So you either need to tell the relevant authorities or he needs to spend much less time at yours.
"I don’t know that was something that could affect my benefits" sorry but I'm not buying that at all! I've been on benefits for years as a single mum under charges of govt etc and it's ALWAYS made very clear by the dwp etc in paperwork AND In interviews etc PLUS it's all over news and SM the anger towards fraudulent claimants etc you'd have to live under a rock not to know!
"Short temper as in shouts easily or gets stressed. Not in a physical way" that's STILL not acceptable especially with young children! Plus if he's that bad less than a year in before you're even living together and still on honeymoon phase in all likelihood he IS prone to violence/abusive behaviour.
Wtf were you thinking getting your kids involved with this guy?
"When he moves in here I was aware that I’d have to stop claiming" he's already moved in as far as dwp, tax credits and your local council are concerned!
Honestly dump this selfish, tight, aggressive loser, get some therapy/do freedom programme and don't have another relationship until you've got your head on straight.
When you do have another relationship take it MUCH more slowly for both your and your kids sake.
Moving in with ANYONE less than a year in is utterly ridiculous. I've said it on another thread recently I'm sick of reading about women prioritising a man over their kids needs!
It's usually shitty men too!
Prioritise your kids! They have NO choice with any of this crap it's so unfair to put them in a position of seriously depleted resources and possible homelessness purely for a bloody man!
"he’s funny oh yea he sounds a hoot generous (even though you all believe him not to be after what I’ve told you) nope Intelligent when it comes to protecting his money yep solvent probably cos he screws others over financially too we get on like a house on fire except when you argue at least once a month or if you DARE to challenge him we have fun doesn't sound much fun he’s supportive how?! and helpful what does he do - genuine question and loving apart from screwing you AND Your kids financially, being controlling, aggressive and impatient with the kids and as solid as a rock when it comes to supporting my insecurities only in so far as it suits him go keep you playing ball
I expect him to come crawling back - and sadly I think you'll let him!
You really shouldn't. You WILL be failing yourself and your kids if you do.
In 15-20 years this could be you and your kids
https://www.mumsnet.com/Talk/relationships/3566468-help