We have just returned to Adelaide after nearly three years "back" in Blighty. It took ages for the wife to find a job and whilst she loved the place, work, people, the money was crap - GBP16K/yr where a similar job in Australia pays around $60K/yr. Money I was being paid in Australia and moving over disappeared way to fast and the exchange rate killed us. We were lucky Canterbury College accepted our kids as UK Residents an didn't apply the two year wait or pay as an international student rule that usually applies to anyone who has been outside of the EU for more than three years. But there was no other support for them.
We are happy to have had the opportunity to give the life a try and had circumstances permitted we would most probably still be there. The biggest lessons we learnt were:-
1. If you have been out of the EU defined area for more than three years you are screwed, your UK Passport and Birth Certificate counts for nothing; you have less rights than the European truckie that's running you off the road because he usually drives on the right and probably bought the licence anyway.
2. You see more of family when you holiday there, they all have their own lives and what with work, etc...
3. If you can do without it, don't take it... International Removalists think you have bottomless bank accounts and pockets.