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12 June 2026
Issue: 8165 / Categories: Legal News , Profession , Constitutional law , International , National security
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NLJ this week: Mandelson affair exposes constitutional fault lines

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The fallout from Lord Mandelson’s appointment and dismissal as UK ambassador to Washington raises profound questions about constitutional governance, accountability and political appointments

Writing in NLJ this week, Professor Graham Zellick KC argues that the affair was marked by 'abuse of authority and procedural irregularity'. Examining the appointment through the Constitutional Reform and Governance Act 2010, he contends that powers vested in the foreign secretary appeared to be exercised instead by No 10.

The article also scrutinises the handling of security vetting, highlighting concerns that key decisions were taken without proper documentation or oversight.

While political appointments to ambassadorial posts are legally permissible, Zellick questions whether they should continue at all, noting their rarity and potential to undermine the non-political nature of the diplomatic service. Ultimately, he argues that failures of judgement, rather than legal complexity, lay at the heart of the 'Mandelson imbroglio'.

MOVERS & SHAKERS

Anthony Collins—20 promotions

Anthony Collins—20 promotions

20 promotions mark major people investment at national law firm, Anthony Collins

Sidley—Elaine Whiteford

Sidley—Elaine Whiteford

Sidley adds competition litigator Elaine Whiteford in London

Charles Russell Speechlys—Claudina D’Costa

Charles Russell Speechlys—Claudina D’Costa

Charles Russell Speechlys welcomes Claudina D’Costa as Director of Client Development Marketing

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