Sir Olly Robbins, a key government aide, is expected to defend his decision not to inform Sir Keir Starmer that Lord Mandelson had failed security vetting procedures.

The situation has created what critics are calling a significant oversight in the communication chain between senior civil servants and the Prime Minister's office. Lord Mandelson, a veteran Labour politician and former European Commissioner, was reportedly subject to standard vetting procedures that raised concerns.

Sir Olly Robbins, who serves as a senior adviser, will likely face questions about the protocols and decision-making process that led to the Prime Minister being kept uninformed about the vetting outcome. The timing and circumstances of when Starmer eventually learned of the situation remain unclear.

The incident has drawn attention to the vetting processes for senior political figures and the communication channels between different levels of government. Standard security vetting procedures are routinely conducted for individuals in sensitive positions, though the specific reasons for any concerns in Mandelson's case have not been publicly disclosed.

The matter represents a potential embarrassment for the Starmer administration, particularly given Lord Mandelson's prominent role in previous Labour governments and his continued influence within the party. The handling of the situation may raise broader questions about information flow and decision-making processes within the current government structure.