Havers represented the Crown in two of the most notable miscarriages of justice in British judicial history: the trial and appeal of the Guildford Four and also of the Maguire family (known as the Maguire Seven), all of whom were wrongfully convicted. Collectively, they served a total of 113 years in prison and one of the Maguire Seven, Giuseppe Conlon, died in prison, convicted on the basis of discredited forensic evidence.

