Porty Light Box

The freshly-painted look belied the plastic wrapping on this phone box, on Portobello High Street.
Then we saw the notice inside, which reads:

This phone box has been adopted by the local community.
For more information, or to get involved, please contact Portobello Community Council.
Many thanks for all the support received from individuals and businesses, near and far.

WWW.PORTOBELLOCC.ORG

Glazing installed by Mark Smith glazing Ltd.

I still don't understand its function, so perhaps a further visit would be more illuminating...