LONDON — U.K. leader Rishi Sunak's Conservative Party suffered significant losses at a flurry of local elections overnight, in a closely-watched indicator of sentiment ahead of the nationwide vote expected later this year. The opposition Labour Party won a Blackpool South by-election, taking the seat from the Conservatives. New Labour MP Chris Webb beat his Conservative rival David Jones with a significant swing of 26%. The Reform UK party, founded by Brexit proponent Nigel Farage, came in third. The northern town's by-election was called in the wake of former Conservative MP Scott Benton's suspension from the party after he was caught offer