LONDON, April 23 (Reuters) - Britain's main opposition Labour Party has suspended high-profile lawmaker Diane Abbott over a letter she wrote in which she said the prejudice experienced by Jewish people was similar to, but not the same as, racism. Labour, which polls indicate is likely to form Britain's next government after an election expected next year, faced accusations of discrimination and harassment against Jews under its former leader Jeremy Corbyn. The equalities watchdog found in 2020 Labour had serious failings in the party’s handling of persistent antisemitism complaints. Abbott, 69, was responding to a writer's claims that Irish, Jewish...