What is the biggest selling UK single of all time?

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Tags

1. #diana
2. #about
3. #selling
4. #princess
5. #following
6. #released
7. #death
8. #double
9. #since
10. #million
11. #tonight
12. #september
13. #wales
14. #single
15. #elton
16. #candle
17. #copies
18. #something