[1] He is the founder and managing director of Portland Communications, which he grew to be one of the leading public affairs consultancies in London, England.
[2][3] He is reported to have sold a majority stake in Portland in April 2012 to US marketing services company Omnicom for £20 million.
[6] Allan started his political advisor role as a researcher for Tony Blair in opposition as shadow home secretary.
The Guardian reported that the consultancy launched on the back of a contract from then BSkyB chief executive Tony Ball, who had previously been Allan's boss.
[4] In April 2012, Allan was reported to have sold a majority stake in Portland to media marketing company Omnicom, for an estimated £20 million.