They sit tete-a-tete at the softly lit bar, nibbling souvlaki and tzatziki washed down with lager.
Scroll down for more More from Richard Kay He murmurs in her ear and she laughs coquettishly. He pays the £26 bill, leaving a £2 tip, no stretch for someone who earns £145,000 a year.
The 54-year-old lawman at the heart of Tony Blair's legal executive is a key figure in the cash-for-honours controversy and, as co-founder of Matrix Chambers, is also a crony of Cherie Blair.
His female friend is vivacious barrister Kirsty Brimelow, 37, who has confided in friends that she is in a serious romantic relationship with a 'married senior legal figure'.
She barely knew the man, but he was married with children, was nearly 20 years her senior and was an influential figure at the chambers where she was working. But in the end, I returned the gift with a polite note.' Thankfully, she seems to have no such misgivings about the attentions of Sir Ken.
However, news of the relationship is likely to stun his colleagues at the CPS offices. I'm off to work.' Miss Brimelow was equally non-communicative.
Not only has Management Today magazine listed her as one of the 'leading ladies' of her generation, she has also featured as 'Lawyer of the Week' in one broadsheet newspaper, and has voiced ambitions to become a Recorder - a part-time judge.
The daughter of a teacher from Chorley, Lancashire, Miss Brimelow was called to the Bar in 1991 and is based in the chambers of Andrew Trollope, QC, at 187 Fleet Street, London.
She received an unexpected present from a male admirer: a carefully wrapped package containing a negligee and a note inviting her to spend the night with him. On the note, he had written something like: "When we meet again, put this in your overnight bag." I was concerned about what was going to happen if I upset him.However, it is known that he receives regular briefings from Carmen Dowd, head of the Special Crime Division at the CPS, who is overseeing the police investigation.It is she who will make the final recommendations on charges, aided by David Perry, QC, a top criminal barrister brought in to act as adviser to the CPS.As he prepares to face the biggest decision of his professional life - whether anyone should be prosecuted over the cash-for-honours affair - he has been giving Miss Brimelow extra legal tuition during overnight stays at her apartment.As the head of the state's prosecution service, a relationship with a barrister who regularly practises in the Crown Courts could lead to accusations that Sir Ken risks compromising his professional position.The CPS chief, who has never prosecuted a case in his career, is set to face the biggest cross-examination of his life..his wife of 27 years and the mother of his three children, Linda, 51, a TV producer.For months, I can reveal, Sir Ken has been using his official car and chauffeur to ferry him to and from Miss Brimelow's riverside apartment.Despite his formidable reputation as a defence barrister, there were concerns that he had no prosecution experience.The closest he has ever come to a prosecution was as an Oxford student, when he was fined £75 for sending cannabis through the post.There will also be concerns that a secret relationship might leave the DPP open to attempts to influence him in his post as head of the CPS, the agency responsible for prosecuting criminal cases in England and Wales.Sir Ken's appointment in 2003 provoked accusations of 'rampant 'cronyism' from Tory MPs.