In this day and age it is essential that you maintain your credit score, and if the worst has happened you need to re-build it.
Most UK expats always return home and nowadays, you cannot even get a bank account without a score, even car insurance needs a credit score..
So if you are living overseas, or planning a few years away... then think of the future, register with myUKpost.com and get a Real UK address, that you can use for correspondence whilst away.... so when you return in the years ahead, lenders and suppliers will be able to see your recent and past credit history and score, as if you hadn't been away!
... For only £10 a month... "2 drinks in Hong Kong!"
... This is probably the most important thing that you need to keep whilst abroad
Credit Score, Rebuild My Credit Score