[Bionic]

Thanks Linda, I googled too and came to the same conclusion, no washing is best.
I certainly wouldn't fancy eating those washed in bleach, yuk 

[benkt]

It appears to me that rules for duck eggs are the same as those for chicken eggs:
e.g.
https://www.gov.uk/eggs-trade-regulations

"The regulations apply to eggs from laying hens sold for human consumption. They also cover hatching, farmyard poultry chicks, and in shell for human consumption, hen, turkey, goose, duck, and guinea fowl eggs."

Leaves the question of what to do with quail's eggs all up in the air though

[Backinwellies]

rules only apply if you have 50+ hens or ducks..... dont think my 6 count!

[benkt]

Rules do apply for any number of hens or ducks - you just don't have to register your flock or register as an egg producer: The rules you follow are the 'farm gate trading of ungraded eggs' ones!
Good flow chart explaining it all here:
http://www.defra.gov.uk/ahvla-en/files/guid-eggs-flowchart.pdf

It just doesn't mention the washed/unwashed debate!