(Reuters) - Standard Chartered on Monday lost a bid to cut from a London lawsuit allegations that it broke U.S. sanctions against Iran in a more widespread way than it has previously admitted.

More than 200 investors are suing Standard Chartered at London's High Court for allegedly untrue statements about its sanctions non-compliance between 2007 and 2019.

The lawsuit comes after the London-based bank agreed to pay $1.1 billion in 2019 to U.S. and British authorities over transactions which breached sanctions against Iran and other countries.

The 2019 deal extended by two years a 2012 deferred prosecution agreement with Standard Chartered, under which the bank paid U.S. authorities $667 million.

The investors, however, allege "industrial-scale sanctions non-compliance" by Standard Chartered beyond what the bank admitted to regulators.

Standard Chartered, which strongly rejects the allegations, tried to have the allegations of sanctions non-compliance which were not covered by admissions to regulators thrown out.

Last year, the High Court ruled the allegations should go to trial, likely to be heard in late 2026, and Standard Chartered's appeal against that decision was dismissed on Monday.

Standard Chartered did not immediately respond to a request for comment.