I have two jobs and the combined salaries are about £3k a year more than DP earns. We each have our own current account and savings accounts, and we have a joint "house" account that we put an equal amount into per month. The joint account is for rent, Council Tax, contents insurance, utilities, window cleaner and car finance payments (ending in January, yippee!).
Out of my account, I pay car insurance, petrol (apart from the odd £20 that DP puts in), MOT, car tax and all other car expenses. When we got together he didn't have a car, so we used mine. When it went to the garage in the sky, we got a new one on finance and agreed that he would pay 50% of the payments (hence it coming out of the joint account) but I would continue to pay everything else because I use the car much, much more than DP does, although it is available for him to use when he needs it with a bit of notice. I also pay my mobile bill out of my account, and debt that I'm clearing.
Out of DP's account, he pays for the broadband (linked to his mobile contract) his child maintenance (£400 per month), the TV licence plus the bit of debt that he's clearing.
We're getting married in a couple of years, so we're trying to save as much as we can, but obviously having a higher income means I'm going to be able to save a lot more. I'll let you know if anything changes once we're married, but this seems to work for us!