That may be everyday life in Aleppo going on but unless a gas main goes up in Central London it usually means a malevolent act from our enemies overseas again so a warning would be helpful. Even PIRA, latterly ,remembered to give the occasional warning.
Considering they built a French village with bridge,canal panzer tanks,estaminets, houses on a set in Elstree Studios and all the cacophony of war (Bloody loud bangs) in Saving Ryan's Privates I would of thought they could just blow up a bus in a studio back lot with out disruption or alarm !
Isn't this identical in appearance to the real tragedy involving a London bus some time ago - a bit inconsiderate of the production team I would have thought.