The momentum is with Corbyn. Opinium. [2015-09-02]. (原始内容存档于2015-09-14). Corbyn takes the lead among Labour voters. Opinium. [2015-08-19]. (原始内容存档于2015-08-23)
Smith as Labour leader and Prime Minister rather than Jeremy Corbyn.. BMG Research. 2016-08-16 [2016-08-16]. (原始内容存档于2016-08-17). SUNDAY MIRROR/INDEPENDENT