In the 1990s and early
2000s, a number of former Lothian Region Transport buses
operated on the streets of Edinburgh, for one day during each
summer, known as the 'Edinburgh Classic Bus Running Day'.
I believe that the
photo above would have been taken on one of these days, possibly
Bus No. 900, above,
was converted to 'open-top' in the days when open-top buses were a
rare site on the streets of Edinburgh.
Now there are four
companies operating open-top buses in Edinburgh. All are
owned by Lothian Buses.