Marriage but living separately

Without going into too much detail, I am trying to find out if/how my UC entitlement would change if I were to get married but not yet living with my husband.

Due to circumstances, we've had to put our wedding on hold & me leave the family home with 3/4 children. The eventual plan is my partner & daughter will join us once I am settled into a new home & my 17yo leaves home once she turns 18.

My C-PTSD & EUPD has been majorly affected since I left and my partner suggested us getting married to possibly ease some of the insecurities & brain worms bothering me.

Until my 17yo leaves, he cannot move in so we are currently running 2 homes - separate bills, council tax, I also get the housing element of UC - our finances are totally separate & the only money he sends me is for child maintenance. Without UC support I won't be able to manage the home by myself.

If we were to get married, would UC consider us a couple? He earns a considerable amount more than me but it wouldn't be enough for us to live if I was to lose my UC.