Thank you all for the feedback.
I'm also debating a similar move, but frankly, I'd rather stay in London. Then again, I'm childless, so your case is different. All the best of luck to you.
If I would move or not was something I couldn`t stop thinking about, it was driving me crazy, but after sometime I just thought about the pros and cons of each place and yes, London is a great place to live for a while, so many things you can do, restaurants, concerts to die for, shops, museums, but in few years time if I will definetely decide to have children, I`m sure nice forests, lakes, peace and lower costs of life are the things I will be looking for. I hope I will never regret, anyway we can always come back;) The best of luck to you too.