Hi Kris,
I was born and raised in Stoke-on-Trent which is a wee bit south of Leeds. I have friends up there still, not a bad place to be, but given the choice of where you are now and Leeds, I wouldn't even get on the plane.
Schools are very ethnically diverse, your kids may have class's in Hindu, Urdu and or Croatian.
If you rise with the sun, don't count on being on time for work. Grey will be the norm as will the cold relatively speaking.
Transport is a nightmare unless you live close to your work, in which case you'll be miles away from anything else.
I would like to make a mention of salary, really study the package your company is offering, the cost of living in the UK is extortionately high.