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From (2018: that link not working but has the text) we learn that there used to be another plaque commemorating Blaney and his colleagues:
"As well as Blaney, nine other men men died on the 13th December 1940 when a UXB was found below No.590 Romford Road, Manor Park. The men were killed when attempting to remove the bomb so access could be gained to disarm it.
From the London Gazette April 15 1941: The King has been graciously pleased to approve the award of the G.C (George Cross) for most conscious gallantry in carrying out Hazardous Work in a very Brave Manner to 2nd Lieut. (Acting Captain) Michael Flood Blaney, B.Eng 11997 Corps R.E (Royal Engineers).
In 1949 it was recommended to East Ham Council by the Housing Committee that a new street on the Gooseley Housing Estate was named Blaney Crescent in his memory. The Royal Engineers (Bomb Disposal) Old Comrades Association asked if they could provide a Memorial Plaque, so the street name plate was redesigned to incorporate this plaque. The Plate, made of Bronze has the street name in Roman lettering in cream Enamel. The inscription, cut in it said, 'Dedicated to the memory of Captain Michael Flood Blaney of the 64 Bomb Disposal section R.E who was killed in this District on the 13th December 1940 whilst engaged in the removing of a Unexploded Bomb'.

Those killed in this incident were {the list of the 10 men is given here in Subjects Commemorated}. The memorial was dedicated on the 15th April 1950. The Memorial Plaque and the accompanying brick work disappeared many years ago and the space is now used to park cars (Lest we Forget?). Blaney had already defused two other bombs in the area we now know as Newham, at Manor Way and Park Avenue."

have a description of the incident.