UPDATE 1-Putin says Britain's May tough on Skripal poisoning case

Russian President Vladimir Putin said on Saturday he wanted to improve ties with Britain after they were strained by the poisoning of a former Russian spy on British soil, but said Prime Minister Theresa May was taking a tough line on the issue.Putin met May at the G20 summit in Osaka on Friday.May's office said she asked Moscow to hand over the Russian suspects Britain blames for poisoning a former double agent and his daughter with a nerve agent in Salisbury, England last year.