Reports of potential insider trading to UK regulators have jumped by nearly 40% over the past year, following a widespread campaign by authorities to clampdown on market abuse.

The number of so-called "suspicious transaction reports" made by firms to the UK's Financial Conduct Authority was 1,035 in the 12 months to the end of August 2013, according to a study by financial services consulting firm Bovill released today. In the previous period, 739 reports were delivered to the FCA's predecessor, the Financial Services Authority.