Stop thinking and pray. She faced east; the slanting sun cast sienna rays above the opposite building. ‘I intend to perform the four rakat fardh of the Salat Al-Asr for Allah.’ She paused, her mind cluttered, impossibly distracted, unable to slip into an automatic empathy with the words she was about to say. Perhaps if her father had drummed discipline into her in the way she’d seen with others, it would be easier. But Tariq Shah was not like that. For him it was cultural, not spiritual – something he and his family had always done. He occasionally looked in at mosque and, however sceptical he might be, wished no offence to Islam – nor any other religion. She had inherited the scepticism but not the temperament to relax with it; self-discipline was her only answer to both.

Ultimately, she told herself, emerging from the jumble of thoughts, it was her duty to her father that justified the professional move she’d made – the money to guarantee his comfort till the day he died. The comfort of this conclusion finally cleared her mind and she raised her arms over her chest. ‘Audhu billahi min-ash-shaytan -hir-rajeem, bismillah-hir-Rahman-hir-raheem.’

Ten minutes later, she was back in the room she shared at chambers with two other junior counsel. Marty Richards was out of London but Sheila Blackstone was there, make-up mirror angled towards full lips, to which she was applying copious layers of scarlet lipstick.

‘Sara darling, you caught me at it! Good day in court?’

‘Yes, fun,’ said Sara. ‘And utterly irresponsible. A wine fraudster. Who could care?’

‘Half the QCs in this Chambers will care a very great deal about that,’ said Sheila, eyes down on her mirror.

Sara hung her coat on a hook and looked at the hand-written envelope. She was tempted to chuck it in a bin – ‘Private and Confidential’ was probably shorthand for ‘I need a free favour’. But there was an edginess in the scrawled writing that stoked her curiosity; anyone sending begging letters would write more neatly. She caught Sheila’s inquisitive eye peering around the mirror, rose and left the room. She returned with the envelope to the ladies, the one guaranteed place of uninterrupted refuge, entered a cubicle and sat on the closed seat. She ripped it open. The printed heading was followed by the same scrawling hand-writing as on the envelope.

The Rt Hon Lord Justice Morahan

45 Chelsea Place Upper

London SW3 6BY

Monday evening

Dear Ms Shah

My apologies for writing to you in such an unusual way. You may remember that we met briefly in Cambridge two years ago at the ‘Human Rights: A Judge’s Role’ conference. I was most impressed with your contribution to that and also by your formidable record in this area.