I get where Lamplighter is coming from. Its such a tough thing for urban planners - especially for a historic city like London, to move into the 21st century, without being in jarring contrast to the past. However all those brilliant historical buildings were once brand new shining examples of architecture and moving into the new century. If you don't as a city continue to move forward you become stagnant. OTOH ... things like Toronto's R.O.M. make over are an abomination.
Take this:
then stick this on it:
.. I'm not sure I know the answer, I don't envy them the question.