I agree that no-one can give amounts, and we're all different, but that's been done to death.
You might find this financial flowchart a useful outline of your money/life and where you are along the way:
ukpersonal.finance/flowchart/
However, what you seem to be forgetting is that there's no need to spend all this money you're going to have straight away or even set a definitive budget.
In fact, as long as you're not the type to go and put it all on black, or spend it on a Ferrari, then there's really nothing wrong with not really having a budget at all and just winging it, subject to so sensible caveats.
I once heard someone say that each time they got a payrise, or some unexpected money, eg a bonus, they thought of the money in thirds.
A third for the past, a third for now and a third for the future.
So a third of it could go on overpaying your mortgage. This will be a useful way to use this money for years to come - you could set up a standing order for a fixed amount. Once you've paid off your mortgage, then you can switch to assigning your money 50/50 or any other split you prefer.
While you're young, you might decide to save more.
While you're putting teens through university, wanting to help them with new homes, or getting into the position where you might have accumulated more money than you will need in your lifetime, you might start to save less and spend more.
So make sure you're overpaying your mortgage as much as you can without penalties.
Also make sure you have money saved for annual and irregular expenses (home improvements, car replacement, holidays, new washing machine, furniture, Christmas, etc etc etc).
But once you've saved a decent amount, you could switch to investing, or topping up your pension. Also save for DC at the same time.
But whichever way, just set up standing orders and forget about it.
Once you've accounted for all the fixed costs, overpay your mortgage, and saving/investing, you can just spend the rest of your money how you see fit - you could separate your bills money from your spending money.
So if you see something you're interested in, such as a theme park day out, and you have money in your spending account, you can just do it.
Or if your DC decide they want to do a hobby, they can.
There's no worry about whether you can afford it.
As for things like clothes and holidays, you could start to spend more on clothes, but there's not much point buying clothes, or anything else for that matter, for the sake of it. Likewise holidays, do you want to go skiing?
If you haven't done it before, I'd seriously suggest having a session at a snowdome at home and thinking about whether you're fit enough to enjoy it.
You wouldn't want to spend thousands on a holiday and not enjoy it.
As you get used to not having to scrimp any more, you might start to notice new things you want to spend your money on, but there's no need to rush into this, or think that you need to set a definitive budget right away.