This week's edition of Commercial weekly highlights includes: analysis of the High Court decision in Alaska Airlines v Virgin Aviation where the court ruled in favour of the defendant, granting summary judgment on a claim for sums due under a contract with Alaska Airlines, notwithstanding a defence of circuity of action based on a claim in unjust enrichment, commentary on the new failure to prevent fraud offence which came into force on 1 September 2025 under the Economic Crime and Corporate Transparency Act 2023, and news that the Department of Science, Innovation and Technology has published a joint ministerial letter on cyber security addressed to all FTSE100 and FTSE250 companies and other leading UK firms.