Before beginning pupillage, Lyndon worked as lawyer at the Law Commission. He was principally responsible for the Sentencing Code project, instructing parliamentary counsel as to the drafting of the Bill, researching and writing the consultation papers and reports. During this time he also worked on projects concerning misconduct in public office and search warrants. Over the past three years he has also conducted doctoral research at Worcester College, Oxford, and will soon submit his DPhil thesis for examination.  Lyndon regularly lectures to judges at Judicial College, particularly in relation to homicide cases, and is a lecturer in criminal law at Keble College, Oxford. Additionally, Lyndon writes Current Sentencing PracticeThomas’ Sentencing Referencer and the sentencing chapter of Archbold Criminal Pleading, Evidence and Practice. He is also part of the editorial team who produce the Crown Court Compendium.

Lyndon started pupillage in Chambers in October 2018 and is currently supervised by Sarah Whitehouse QC.