Kammala jumla mai zuwa: Robertson ya zama barrister a 1973, kuma an nada shi QC a 1988. Ya zama sananne sosai bayan ya yi aiki a matsayin mai ba da shawara a cikin fitattun fitattun laifuka na Ingila na "OZ", "Gay News", ABC Trial, "The Romans in Britain" (kotu da Mary Whitehouse ta gabatar), Randle &amp; Pottle,
Bam din Brighton da kuma Matrix Churchill. Ya kuma kare mai zane J. S. G. Boggs daga tuhumar sirri da Bankin Ingila ya kawo game da zane-zanensa na kudin Burtaniya.