Would this be fair?

[sortingmylife]

I work evenings 5 days a week and look after DS through the day whilst OH works.
I bring in around 600 a month and from that I pay for the groceries, toiletries, my car insurance, gas and electric, my petrol and my phone bill and dog groomers (every 6 weeks). I don't have much left over at the end of the month.
DP covers all the mortgage, council tax, running of his car and petrol (v. Expensive as he uses his car for work and does a lot of miles), his phone, house phone and Internet. Additionally we have another property and some land we have decided to invest in for the future so ATM he's also covering the mortgage and loan on those.

ATM we don't really buy clothes or spend much money on ourselves.

He's in a good role where there's a lot of opportunity to earn extra each month so his budget is quite fluid. He can always afford extra outgoings such as changing tyres on car or fixing it if it broke, I always have to go to him and say "I need to do an mot on my car" or "I need new tyres". Recently I'm having to mention that I need some maternity wear etc.
He does not spend money on himself btw just to make that clear as we are not in the best situation it's just he seems to have more to work with if that makes sense? But of course if he has to he can afford to go out for lunch or take us out.

We've been discussing what we should do recently and he said I should have a think about how I'd want it to look and tell him as he's open to suggestions.

I'd like all our income to go into one joint account where we will pay all our bills from, buy groceries and cover everything else, it would make me more comfortable as I wouldn't have to feel like I have to ask for permission to e.g. service my car (or whatever crops up) as I will be able to see if we have enough this month etc. If the budget allows it we could also allocate an X amount of spending money each per month for any extras e.g. Hairdressers/clothes/takeout or whatever we choose to spend it on.
If possible I would also try to make sure the account always stays above a certain balance so we have a bit of a buffer and anything left 'over' that balance at the end of the month be put in a savings for emergencies, Xmas, unexpected outgoings etc.

Is it a reasonable idea?

Yes, that seems very fair. You should work as a unit

Thank you I will talk with him tonight.
The only thing that concerns me is he will still have "extras" to put aside as he can sometimes get cash for selling odd bits here and there (perfectly legal btw) so I know he will always have the means to buy me a gift (Xmas etc) or put money aside for a purchase whereas I will just have to be thrifty with my "personal" budget.

I think you should also get some personal spending money from the joint acc (could be 10 pounds, could be 500, depending on what your budget is - but you should both get it).

Yes!!!! Joint accounts are great, especially once you have kids

Vim I mentioned the personal spending money if we can afford it of course.

Not sure how it will all work out once/if we do it and if we will have enough.

We put all our money into a shared account and spend on essentials. Any larger expenses need to be agreed jointly. However, we also have the same 'pocket money'. That way there is no issue with the cost of beauty, clothes or DH's hobbies as all that comes out of pocket money. Personally, we decided on the same amount for DH and me although he's a much, much higher earner but some could arrive at the amount based on needs or earnings.