The figure you quote sounds plenty for a decent standard of living, but of course, costs can vary depending where you choose to live - even in Yorkshire, house prices vary considerably depending where it is. I'm assuming from what you say, though, that the £30,000 is what you would have left per annum once house and cars are bought. We don't know what sort of hobbies/interests/pass times you are interested in, as obviously some hobbies and travel are expensive, others less so, but even so, the income you mention should allow you to live a comfortable life, especially as you say it's after tax. It's the obvious things you will have to factor into your calculations:
Council tax, food bills, house and contents & buildings insurance, car tax, MOT and car insurance, clothing, travel costs, petrol, hobbies, utility bills, tv licence, telephone & broadband, etc.
Most of these, you will be able to shop around for to get the best deal, Council tax will depend on location and house size, car tax will depend on the cars you choose, car insurance will vary according to the type of car.
Then, of course, there will be occasional spends, e.g. you might need a new boiler at some point, or new double glazing/doors, that kind of thing.
Hope this helps, and welcome back!