Mark Kelly KC, Defence Barrister. For over thirty years, Mark has garnered his extensive knowledge, expertise and inimitable doggedness for every case in which he has been instructed to ensure the best possible outcomes for his clients. Mark s clients benefit from representation by a trusted professional and highly experienced barrister who is known for his strategic thinking, transparency and unwavering commitment to his clients. Mark is a Member of No5 Chambers, one of the largest and most renowned sets of Chambers in the UK.