I sort of moved. I lived in London then and do now, but took a job in Newcastle for a couple of years which involved living there for most of the week.
The main reason it didn't take for me was because my DH and I (not married at that point) nearly split up over lack of time together, but for me too, being away from London didn't take.
There are wierd cultural things (in London in my working field, most people work 9.30 - 6 or 7pm, there they all trooped out of the office after 5, trying to get any work done after 5 was impossible; people didn't go straight out from work for a bite to eat and a drink - just went out for a drink having been home for dinner).
These things sound tiny and petty but made me feel like a massive fish out of water. I also find friends in London settled down and had kids a lot later (i.e. late 30s rather than late 20s) and so lifestyles and expectations were different.
Finally, having lived in a v diverse part of London for the best part of a decade, it just felt too white. Not racist or anything at all like that, I'm just used to having a different vibe in my neighbourhood.