Carl Walker, who was deputy leader of the Labour-run council, said he was “incredibly proud” of what the council has achieved “in helping turn Worthing Council red, our amazing community activism and the fantastic work we’ve all done as Worthing’s first ever Labour council”.
“The national Labour Party stands in direct contradiction to my personal and political values and no longer feel that I can represent it in good conscience,” he said in a statement.
He criticised the party’s green policy, its stance on the conflict in Gaza, its “refusal to reverse the two child benefit cap” and the party’s “commitment to the continued privatisation of the NHS”.