It appears that explosive used in London bombing was high (brisant) military explosive that came from Vitez.
If you didn't have a clue, sure, it could appear that way.
If, on the other hand, you followed the investigation, you'd know that the bombs utilized explosives cooked up locally from items one could purchase at stores.
In London bombing as in Srebrenica, there are too many unanswered questions. Official story stinks and does not hold water! Bombs cooked up locally you could purchase at store do not make damage one can see on pictures.