Born to an Australian father and English mother, Robson played under-19 cricket for Australia but qualified for England in August 2013.

[2][9] He left Sydney after school as he was stuck behind Usman Khawaja, his schoolmate[10] Phillip Hughes, and others in the NSW pecking order.

[1] Robson made his first-class debut in June 2009, scoring 43 and 23 for Middlesex against Essex County Cricket Club at Chelmsford.

[13] He is a "wiry Australian who loves the circuit" and, according to Cricinfo's Mark Pennell, "With an English mother and a UK passport to his name, he looks to be a decent find.

[11] Robson has expressed a clear commitment to Middlesex as he views the County Championship as the best tournament for his development as a cricketer,[7] but under current rules as a dual national he would be treated as an Australian player if he played for an Australian state side and thus would be treated as an overseas player at Middlesex.