London transport staff warned of anti-mask posters with razor blades

(NB. These blades could be accessed by other groups or individuals for attack purposes)

London transport staff have been warned after anti-mask posters with razor blades on the back were found, a union has said.

The Rail, Maritime and Transport (RMT) union said it had raised the issue of "Masks Don't Work" posters with Transport for London (TfL).

TfL said it was not aware of any incidents involving blades but had given advice to its workers.

A similar poster was found in Cardiff where a woman was injured removing it.

The RMT called for the courts to take the "hardest possible line" against those found responsible.