I've been living in the US for the last 16 years, and 2 years
ago had toyed with the thought of moving back to SG. I even went to
the effort of going for interviews when I was on vacation in
SG.
I get to visit SG every year since I'm in the region for
business, and SG always appears very vibrant and dynamic, with so
many new things going on. Compared to where I live in the US, where
all the stores and restaurants close by 9pm, SG is so much more
"happening".
However, after discussing this with friends and family, I soon
realized that the SG work-life balance is very negatively skewed.
Forget about leaving work at 6pm if you're in middle management or
above. The population density is crazy, and things are getting so
much more expensive.
Therefore, I've decided to stay in the US until I retire, when I
will probably migrate back to SG based on the convenience of living
in a housing estate with shops and amenities close by.
The SG that I yearn for in the mid 90's is no longer there, so
I've told myself to get over it and move on.
But back to your point, please consider carefully about how much
of a lifestyle change you and your family will need to endure if
you do move from the UK to SG. You didn't mention which part of the
UK you live in, but I assume it's a stark difference from SG in
terms of weather, culture, food, etc.
In the end, if you do plan to make a move, it could be temporary
to get your feet wet and see if you really do want to stay long
term.