Police said Paul Solway caused the blast by tampering with a gas pipe and setting fire to a chair.
Robert Smith, 61, died from drowning at an address in Erdington in October 2023.
The requirement to obtain permission had gone largely unnoticed until a German newspaper reported on it.
Leicester City lose their appeal against their six-point deduction for breaching EFL financial rules.
"All I know is I want to start terror, bro," one of the men allegedly said in the attack outside the NYC mayor's home, Gracie Mansion.