Do British Airways Executive Club miles expire?

Related questions

1. How do BA Tier Points work?
2. Do you get tier points If you part pay with Avios?
3. Do you have to fly BA to use lounge?
4. Do Ba reward flights earn tier points?
5. How do I transfer my qmiles to another person?
6. Does World Traveller plus get lounge access?
7. Can you gift your Avios points?
8. Does World Traveller plus get priority boarding?
9. What's the difference between avios and BA Executive Club?
10. What food is served on British Airways?

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