Regarding St Pauls; when it was very close to the flames on one particular night Churchill ordered that all available resources be sent to St Pauls to prevent it being gutted, as he knew what a devastating blow to morale it's loss would be. Thus ensuring that many lives/houses/industrial units were lost on that particular night.
I know we often (well let's be honest, always) knock politicians but they have to make some awful calls, I'm glad I wasn't in his shoes that day.