Very few people realize that moving to another country means becoming an immigrant, and very few locals view immigrants highly. Just as in the uk....
As an immigrant to a new country, you will realize it is more than just a move across town, or across your own country, it is a move into a different culture. It takes time to get to know and understand new cultures. Even those we think are similar to our own, either through being a geographically or linguistically close.
Being an immigrant means you have to be aware that people have certain preconceptions about you, and that these will be flung into the other persons mind as soon as you open your mouth and reveal your accent/dialect.
Toffee nosed Brit, Stiff upper Lip Brit, Ibiza Party Brit, cool Britannia Brit, Breadline Britain Brit, people will judge you based on what they know about your country, which may or may not be right.
Another problem with moving to a different country is that you will work on the assumption of life as you know it. Taxes as you know it, Tax returns as you know it, TV license as you know it, School system as you know it, and you may not even know what to ask because you dont even know where to begin, because you dont know which parts are different and which parts are the same.
It is also not so easy for children to fit into already formed friendship groups. And equally not for adults to make friends when starting from scratch.
Especially not without a support network of friends and family.
It is hard to imagine what impact life without family is like. Or life without anybody to even go for a coffee with.
Will you be working?
If not, what are you going to fill your days with? Together with whom?
Are you just going to sit and wait for husband and kids to come home from work? Explore shops? 
What dream is this exactly?
Every day life is every day life, where ever you live. Only harder when you get rid of everything you know, to start again in a new place.
There will be a time when you think:
"Where the fuck is my wok. OH, I dont have a wok, I took it to the charity shop back in Yorkshire." Now, time multiply this with every item of household goods you have, and one day you might end up cursing the day you chucked out/gave away a perfectly good tin opener/wok/kitchen aid just so you could buy it again across the other side of the planet.