Council data estimated the by-election triggered by Mr Kilburn’s resignation would cost about £22,800, according to the Local Democracy Reporting Service.
“I have campaigned for the Reform Party’s millionaire backers to pay for the £23,000 of council taxpayers’ money they have wasted on this by-election due to their own incompetence nominating an ineligible candidate,” Rooney said.
A Reform UK spokesperson said: “This is nothing more than cheap political point scoring. The Liberal Democrats, who have received over £10 million in donations from one individual alone, should lead by example.
“Mr Rooney did not make these same calls when a Liberal Democrat councillor resigned their seat within a week of being elected in Edinburgh in order to move abroad.”
The turnout for Thursday’s by-election was 37%.
