 Allenby began playing senior cricket for Durham Cricket Board, though he only played one game for the team and it was a further three years before he made another first-class or List A appearance.Having played second XI cricket for Leicestershire Allenby broke into the first team in 2005, he made three appearances in the Twenty20 Cup and played one one-day match at the end of the season.During the season he played club cricket for Brandon Cricket Club in the North East and scored a league record 266 in a 45 over match against Langley Park.