I am sorry but all this talk of her aiding morale in the East End (and elsewhere) is completely overated.
I was stationed near the palace during WW2 and so am aware of the situation.
Usually when there was a bad raid on London the King and Queen were where they usually were (all week),at Windsor! as were Princesses Elizabeth and Margaret.
They only returned for photo opportunities,and then were whisked off to Windsor again.
They couldn't have stayed at Buck House as it was completely mothballed for the duration of the war.
When the bomb fell on Buck House Chapel,they were at Windsor.
As regards Charles and Dian's break up, far from the Queen Mum being involved in it,she tried to keep them together.
Why?
Well, Lady Fermoy (Diana's Grandmother) was QM's Lady in Waiting.They had hatched a plot to wed Diana to Charles.Mainly to preven Lordt Mountbatten getting Charles married to his(Mountbatten's) Grand~Daughter,and thus making the sucession to the throne pure Mountbatten!
So when he died in August 1979 at the hands of the IRA,the field was left wide open. As we know Charles and Diana were engaged in February 1981 the QM & Lady Fermoy's plans had come to fruition.
Of course we all know the sad train of events that followed.
I don't like the QM, but it was apparent she tried her best to keep them together.
Sounds more like Dallas doesn't it?