On June 30, 2016, the final UK Regulations implementing the new EU MAR in the UK were published. MAR applied directly across the EU from July 3, 2016 except for those concepts that stem from the MiFID II package, which will be introduced in January 2018. The Regulations set out, amongst other things, how notifications and applications should be made to the FCA, when explanations for delaying public disclosure of inside information must be provided to the FCA by issuers and amendments to the FCA's powers to monitor for market abuse and enforce any breaches of MAR, including imposing financial penalties or administrative sanctions such as prohibitions on trading financial instruments. The Regulations also amend certain provisions of the UK laws on auctioning for emission allowances from January 2018. The Regulations came into force on July 3, 2016.
The Regulations are available at: http://www.legislation.gov.uk/uksi/2016/680/pdfs/uksi_20160680_en.pdf.