Sir Olly Robbins, the former head of the Foreign Office who was sacked by Prime Minister Keir Starmer in April over the Peter Mandelson security vetting scandal, has launched a formal legal challenge against his dismissal. The move marks a significant escalation in the ongoing controversy surrounding the handling of Mandelson's appointment as US ambassador and raises questions about the government's treatment of senior civil servants.

The FDA Union, which represents senior civil servants including Sir Olly, confirmed on Monday that he has submitted a request for a judicial review of the decision. According to the union, Sir Olly was given what he considers to be 'irrational' reasons for his removal as the top civil servant at the Foreign, Commonwealth and Development Office (FCDO). The union has also called on Sir Keir Starmer to 'admit that sacking Olly was a mistake'.

At the heart of the legal challenge is Sir Olly's claim that the Prime Minister lacked the statutory authority to dismiss him. Sources close to the case argue that the removal was procedurally flawed and that the reasons provided did not justify such a drastic action against a senior official with decades of service. The case is expected to test the limits of ministerial power over the civil service and could set a precedent for future dismissals.

The dismissal stemmed from the fallout over the appointment of Lord Peter Mandelson as the UK's ambassador to the United States. Sir Olly was accused of mishandling the security vetting process for Mandelson, a former cabinet minister and close ally of Starmer. The scandal erupted when it emerged that Mandelson's appointment had been fast-tracked without proper scrutiny, leading to accusations of political interference in the appointments process. Starmer, facing intense political pressure, moved to sack Sir Olly in an attempt to contain the damage.

However, Sir Olly's supporters argue that he was made a scapegoat for a decision that was ultimately political. The FDA Union has been vocal in its criticism of the government's handling of the affair, stating that the sacking was 'unfair and unjustified'. The union has also highlighted that Sir Olly had a distinguished career, having previously served as the UK's chief Brexit negotiator under Theresa May, and that his dismissal could deter other senior officials from speaking truth to power.

The legal challenge is likely to reignite debate over the independence of the civil service and the extent to which ministers can hold officials accountable for politically sensitive decisions. Constitutional experts have noted that while the Prime Minister has the power to appoint and dismiss senior civil servants, such decisions must be based on clear and rational grounds. If the court finds that the dismissal was unlawful, it could force the government to reinstate Sir Olly or pay substantial compensation.

Downing Street has so far declined to comment on the specifics of the legal challenge, but sources have indicated that the government will robustly defend its decision. A spokesperson for the Prime Minister previously stated that the dismissal was necessary to restore confidence in the Foreign Office's vetting processes. However, critics argue that the government's handling of the Mandelson affair has been chaotic and that the sacking of Sir Olly was a politically motivated attempt to shift blame.

The case is expected to be heard in the High Court in the coming months. Legal experts suggest that the outcome could have far-reaching implications for the relationship between ministers and the civil service. If Sir Olly succeeds, it could embolden other senior officials to challenge ministerial decisions, potentially altering the balance of power within Whitehall. Conversely, if the government wins, it could reinforce the principle that ministers have the final say over the composition of their departments.

Meanwhile, the Mandelson appointment continues to generate controversy. Lord Mandelson has taken up his post in Washington, but questions remain about the transparency of the vetting process. Opposition parties have called for a full inquiry into the affair, accusing the government of cronyism. The legal challenge by Sir Olly Robbins adds another layer of complexity to a scandal that shows no signs of abating.