Recently separated

Hi.
I am mum of a large brood (ages 4-15). I asked my husband for a few days break to recover from a very heated argument.
That was two months ago. I gave clear boundaries of what I expected if he was to come back and he wouldn’t agree to them.
I had hoped we could work on our marriage of nearly 20 years but today he has advised me to expect contact from his solicitor on Monday.
What should I be expecting.
I have no income as I am a full time mum to our children.

Welcome to Wikivorce but sorry you find yourself here.
Have a good look at the site. There's lots of useful information about separation, divorce and finances here and plenty of people to offer support and answer questions.
If divorce is on the cards and there are children involved, the priority is to ensure they have secure and stable housing. If he is not living there he is liable to pay child maintenance based on his income and the number of children you have.
You should find out what benefits you can claim as a single parent.

Is the house in joint names?

The divorce and finances are separate. I would suggest you do nothing (apart from checking benefits entitlement which you can do online) until you know what's in the letter.

When you have received it, come bsck and we will help you sort out the next steps.

Hadenoughnow

Thank you.
We have 6 children. I don’t think he will Contest custody. He doesn’t have the time nor capacity to parent them. And I am allowing unrestricted access so there is no animosity there.

The house is joint mortgage in both our names. 9 years remaining.
He has moved in with his parents. Financially, I am Eligible for Tax credits via universal credit and have created an account via the website ready for this.
The husband has already set up new bank accounts and is having wages paid there so I no longer have access to his finances. He has kept the joint account open and is putting in enough money to cover the bills whkk I’llst I get myself sorted. His words.

Check what he should be paying for child maintenance using the CMS calculator. If he isn't paying this as a minimum then point it out if you are getting on or apply to CMS for an assessment.

Make sure you are claiming all the benefits you are entitled to.