Sterling tumbles on Brexit turmoil; dollar, oil jump

SHANGHAI (Reuters) - Sterling fell on Monday, helping to boost the dollar to a 16-month high, amid mounting doubts over whether Prime Minister Theresa May can come up with a Brexit deal that would win the backing of the European Union and her own party. European shares were set to open higher, however, ignoring a broad flight from riskier assets seen in Asia, where equity markets wobbled on concerns about slowing global economic growth, particularly in China.Financial spreadbetters expected..