Dave Arquati wrote:

Wasn't there an attempt on some London public transport operator to
use
stick-on transparent plastic to protect the window surfaces, which
was
cheap and relatively easy to replace (avoiding replacement of the
whole
window) if etched?

Southern have done that with their refurbished 455s (obviously,
combined with replacement of the ruined windows!) Some Thameslink 319s
also seem to have it applied in random fashion - but for some reason
Thameslink suffers less than the others from vandalism in general.

SouthEastern claimed (in an exchange of emails some time ago, when I
was congratulating them on repainting West Dulwich station every time
it was attacked - so roughly once a week) that the vinyl approach
didn't work, but I notice in their latest newsletter that the Networker
"refreshment" is going to include fitting anti-scratch vinyls. Hurrah.
Merry Christmas, everyone!