This article from the Money advice service os worth looking at as it does not see one way as 'right'
www.moneyadviceservice.org.uk/en/articles/should-we-manage-money-jointly-or-separately
Share, divide, pay an allowance or keep your money separate?
It’s up to you how you manage your money when you’re in a relationship. Generally, there are four main ways you can do it:
keep separate accounts
share and manage everything as a couple
the main earner pays their partner an ‘allowance’
share some responsibilities but keep some things private.
You can find more information on how each method works below, but remember you’ll need to think carefully about which best suits your situation.
Main earner pays partner an allowance
If one of you isn’t earning, or earning less than the other, you could both keep separate accounts and have the main earner pay their partner an allowance.
The main earner can transfer an agreed amount each week or month to their partner’s account.
You can both decide whether the amount that is transferred is money for household bills and spending money, or just personal spending money.
There are a few things to discuss before going down this route:
Make sure you both feel comfortable with the idea.
The allowance should not be seen as a ‘favour’ – if one partner is looking after the kids, or working as a carer – that’s a job too.
Talk about all types of expenditure that needs to be covered by the allowance and make sure the monthly or weekly amount is enough