I don't believe the Tilley mantles ever contained asbestos as they're made of silk or sometimes rayon. The only exception would be the early radiator mantles.
It might have once, but unless the mantles are really old, they're made of silk thread, aren't they? ...or rayon if it's a rayon mantle. Does anyone have more info on this?
Yes, I did wonder.. perhaps it was a reference to older mantles I read.. Lots of nasty dust to be careful of when disposing of old mantles as well Lots of older mantles still about too