I am opposite to you, as I don't see any positives about living in UK anymore (lower wages, too many people, horrible commuting IMHO) You may fall into the same trap as I did ,of (literally) the grass is always greener. It is not. If you have had enough of the sun, take a winter holiday. Your lifestyle and stability is not worth risking because of homesickness.
I threw aways everything we'd worked hard for here, cause of f*cking homesickness. My sister deals with it by taking regular visits "back home" to UK (every 1 or 2 years). I say to her, "Debbie, if you like going back to UK why don't you live there?". She replies, "I love going back for a holiday, but I could never live back there". She has a nice confortable life in Melbourne, good job, lots of money, nice house. Why would she leave ????