How ridiculous 🙄 why not make the best of the opportunities in the place that you are living?!
Where you live in the UK, your personality, your outlook on life, the type of person you are drawn to and the people that are drawn to you will have the biggest impact on you no matter where you live in the world.
In the UK if you like an outdoorsy lifestyle then living somewhere close to a national park or beach or countryside would be a natural choice which is possible everywhere since the UK is a very small island at the end of the day.
The amount of public bridleways, footpaths and byways crisscross the length and breadth of the UK including the all around coastpaths so if you and your children want to take up hiking or cycling or horse riding or get a dog then you will have amazing new opportunities to do that here if your only friends so far have been for shopping and TV watching!!
There are plenty of places in the UK where your DC having their own ponies or riding is not difficult or considered an elite sport compared to the rest of the world.
There are whole new worlds out there in terms of clubs and events and friendships be it climbing, year round wild swimming, cycling, WI, cooking, gardening, sailing, trainspotting, kite or model aeroplane flying, gliding, paragliding, coasteering, kayaking, canoeing, rowing, scuba diving, swimming, sewing, arts and crafts, archeological digging, history, creative writing, music, dancing, singing, festivals, human rights, animal welfare, volunteering, dog walking, dog agility...the list goes on.
Best not be narrow-minded nor have a negative mindset op.