Theresa May has been labeled “disgraceful” by the Fire Brigades Union (FBU) for citing her response to the Grenfell fire disaster as a proud part of her legacy.

During her emotional resignation speech, the outgoing prime minister said the office had given her a “platform to give a voice to the voiceless, to fight the burning injustices that still scar our society”.

She added: “That it is why I set up the independent inquiry into the tragedy at Grenfell Tower, to search for the truth so nothing like it can ever happen again, and so the people who lost their lives that night are never forgotten.”

But FBU reacted with fury through the general secretary Matt Wrack who said: “Many of the underlying issues at Grenfell were due to unsafe conditions that had been allowed to fester under Tory governments and a council for which Theresa May bears ultimate responsibility.

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“The inquiry she launched has kicked scrutiny of corporate and government interests into the long-grass, denying families and survivors justice, while allowing business, as usual, to continue for the wealthy.

“For the outgoing prime minister to suggest that her awful response to Grenfell is a proud part of her legacy is, frankly, disgraceful.”

Africa News24 (AN24) reports that Ms May’s impending departure has triggered a race for the Conservative leadership, with the party pledging to install a new prime minister by the end of July.