‘Sorry, Arthur,’ I said, trying to look as apologetic as possible. ‘Any messages for me?’

‘Only those already in your box,’ he said, nodding towards the papers in my hand. Fortunately for me his telephone rang at this point and I scampered for the safety of my desk while he answered it. Why, I mused, did I always feel like a naughty schoolboy when in Arthur’s company. Maybe it was because he instinctively knew when I was not where I should be at any given time, usually because I was on a racecourse somewhere having more fun.

Perhaps my nervousness was the result of a guilty conscience. On more than one occasion during my early years I had been forced to sit and listen to Arthur deliver a warning about my conduct, no doubt passed down from my more senior colleagues. Even though each of us was self-employed, the level of our billing was relevant to the smooth running of chambers and no one would be carried as a passenger if their fees were below par. Fortunately for me, in spite of taking days away to ride in races, my fee base was strong and none of my colleagues could ever accuse me of not pulling my weight, which had been eleven stone three, stripped, at Sandown Park races on the previous Saturday.

I sat at my desk and looked out of the window at the Gray’s Inn Gardens, an oasis of calm in the centre of the great bustling metropolis of London. The lines of plane trees, which in summer gave shade to the hundreds of office workers who came to eat their lunchtime sandwiches, were now bare of their leaves and stood forlornly pointing skywards.

They reflected my mood. If our legal system couldn’t lock away dangerous brutes like Julian Trent because they frightened people away from telling the truth, then we were all in trouble.

Al Capone in 1920s Chicago was untouchable by the police. No witnesses to his many crimes of murder or assault would ever give evidence against him. It would have been a death sentence to have done so. Capone was so bold as to make public appearances for the media and was something of a celebrity around town, so sure was he that no one would bear witness against him. In the end the evidence that convicted him was a crude accounting ledger, allegedly in his own handwriting, showing his vast unlawful income, which had been discovered in a desk during a routine police raid on an illicit liquor warehouse. United States law made it clear that even illegal earnings were subject to federal income tax, so he was found guilty, not of murder and mayhem but of tax evasion. Capone’s middle name was Gabriel but he was certainly no angel. The jury for his trial was changed on the day of the proceedings to frustrate attempts to bribe or threaten the original panel, and still he was convicted on only five of twenty-two charges. But it was enough. Abrave judge threw out the plea bargain and sentenced America’s Public Enemy No. 1 to eleven years in jail. Justice had triumphed over intimidation.

As Sir James Horley had said, it was an absolute disgrace it hadn’t done so in the Trent case.

I leaned back in my chair and yawned. Contrary to what Arthur might think, the reason I had arrived late was not that I was lazy, but because at five in the morning I had been still reading the case notes for a trial in which I was currently leading for the prosecution. The court was not sitting on this particular Monday and I could have spent the whole day in bed if I had been so inclined, but I needed to use the library.

The case was against a pair of brothers who had been accused of conspiracy. Such cases were always difficult to prosecute. When does dreaming about robbing a bank become conspiracy to do so? The brothers were accused of conspiring to defraud an insurance company through a loophole in their motoring policy. The brothers had claimed in court, and under oath, that they were only seeing if the scheme was possible in order that they could then tell the company so its security could be tightened, and that they had no intention of carrying through their plans and keeping the illegal payment.

This might have been perfectly believable, except that the brothers had twice before been convicted together of fraud and were suspected of many more. The question I had been spending so long researching, and for which I needed the chambers’ detailed index of trial records, was whether these facts could or could not be used in court. English law relies heavily on precedent to determine whether something can occur. If it has been allowed before then, by definition, it can be again. If it hasn’t happened in the past then it might be cause for appeal right up to the House of Lords for a ruling. The trial judge would make the decision, but counsel had to provide arguments first. In this instance, as the prosecutor, I needed to find similar circumstances from the past that would strengthen my case to have the brothers’ previous convictions revealed to the jury to show pattern of behaviour as evidence of their guilt.

Not all the work of a barrister is as exciting as that depicted in TV trial dramas.

Consequently, I spent the rest of the day with my nose in leather-bound volumes of trial records and then in front of my computer screen searching on the internet. At least, for the most part, my search was fairly restricted. Prior to 2004 evidence of previous convictions was excluded from trials completely except in very special circumstances.

The fact that someone has committed a crime before is not, in itself, evidence that they have done so again. In many cases, quite rightly, former misdeeds should not be used to sway a jury to produce another guilty verdict. Each case should be tried on the current facts rather than on those of previous incidents. Even the most prosecution minded of judges could often believe that allowing previous guilty verdicts to be disclosed to the jury might be prejudicial to a fair trial, and hence grounds for a successful appeal. There is little worse for a barrister’s ego than to win a case for the prosecution in the Crown Court only for the verdict to be overturned on appeal. All those late nights of work, all those missed social engagements, all that effort and for what? For nothing.

Well, I suppose there was the fee, of course, but for me, as in racing, it was the winning that was far more important than the money.

By seven thirty I’d had enough of ploughing through past judgments, but at least, by then, I had produced an all too short but fairly comprehensive list of precedents to further my argument. I packed everything I needed into a box ready for the morning and slipped out into the night.

I lived in Barnes, south of the Thames in west London, where my wife, Angela, and I had bought half of an early Edwardian detached house in Ranelagh Avenue overlooking Barnes Common. Typical of its time, the house had been built with a lower ground floor with high-up windows where the servants had performed their duties cooking, washing, and generally looking after the family above, but it had since been modernized and converted into two homes. Angela and I had acquired the top half, the upper two floors with views over the treetops from the dormer windows of the bedrooms. Our neighbours below occupied the original ground floor of the property with its grand rooms, together with the old servants’ area below.

Angela and I had loved it. It had been the first home that we had owned together and we had lavished more time and money than was prudent on decorating the place and getting everything ready for the birth of our first child, a son, due six months after we had moved in. That had been seven years ago.

As usual, I walked home across the common from Barnes station. It was almost completely dark, with just a few beams of light filtering through the leafless trees from distant street lights, but I knew every step of the route. I was about half way when I remembered Julian Trent and his baseball bat. Perhaps it wasn’t such a good idea to walk alone across Barnes Common in the dark, but I had always felt more threatened when sticking to the roads with their meagre lighting. I stopped to listen for anyone behind me and I did turn round a few times to check, but I made it safely to my door without incident.