Mark Tottenham is a barrister and mediator practising in Dublin, as well as a STEP-accredited Trust and Estate Practitioner. He is the lead author of A Guide to Expert Witness Evidence (Bloomsbury Professional, 2019), which won the DSBA Practical Law Book of the Year Award in 2020. He has written for other Bloomsbury Professional publications including Laffoy's Irish Conveyancing Precedents, and the Irish Tax Reports. He was the founding editor of Decisis (formerly Stare Decisis Hibernia), an online law reporting resource, which has published reports on all Irish judgments since 2011. He is the co-presenter of The Fifth Court, a podcast on legal affairs in Ireland. He previously presented Law on Trial, which won the Podcast of the Year award at the Justice Media Awards in 2022.