Even as the row over the lax border controls refuses to die down, another controversy has surfaced.
An immigration officer has owned up misconduct after falsely issuing visas to foreign nationals not entitled to stay in the UK.
In the different, yet still related matter, the head of the civil service has been asked to probe claims that one of the Home Secretary's advisers was behind briefing the media against the border force’s former head Brodie Clark.
Working for the border agency at the time of the offences in 2008, immigration officer Samuel Shoyeju, 53, acknowledged the count of `misconduct in public office’ by falsely handing out indefinite leave to remain to non-EU residents.
Taking up the matter, Judge Christopher Mitchell, at Basildon Crown Court, remanded Shoyeju to custody.
Shoyeju was also warned that he was facing a "significant custodial sentence".
Shoyeju committed the offence while he was deployed as an immigration officer in Croydon; and had also worked as an entry clearance officer in Nigeria.
On behalf of the prosecution, Lucy Kennedy said that Shoyeju, of Namur Road, Canvey Island, Essex, had issued scores of visas to Africans, who would not otherwise have succeeded in pleas to stay in the UK.
Even though the prosecution could not establish he did so in exchange for money, bank documents have been procured showing Shoyeju got payments of tens of thousands of pounds over the same period.
The development is significant as Rashidat Ana-Obe, 36, from Dagenham, has already admitted fraudulently receiving indefinite leave to remain in a related case. Another woman faces a connected charge of misconduct in public office. She is due to face trial next week.
Meanwhile, Labour MP Simon Danczuk wrote to Sir Gus O'Donnell asking him to probe whether May's special advisers had been accountable for the unattributable briefings.
In his letter to Sir Gus – with copy to May – Danczuk said: "I am writing to raise serious concerns about suggestions that advisers to the Home Secretary may have been briefing against a serving civil servant who had been suspended and therefore had no right to reply."
The Rochdale MP went on: "If the information about Mr Clark, who at that time was still suspended and had not resigned, came from one of the Home Secretary's special advisers, then this appears to be a breach of the code (of conduct for special advisers)."