Ooh, I don't know if my bandwidth will ever be the same again!
The simple answer is that this is a composite view, with the Crystal Palace and Rosary, and the Parliament buildings of the 1911 Festival of Empire taken from opposite angles.
Apparently someone from the Exhibition Study group has analysed the Campbell Gray postcards of the same time, to confirm that all the people shown attending, were cut out of photographs of completely different events
They were the people who also brought that weighty tome out - on the BACKS of Crystal Palace postcards!
