Lobbying giant filmed offering reporter payment for flattering client coverage in national press

Exclusive: Guardian investigation of CT Group uncovers practice that appears to seek hidden influence over public opinion

A political lobbying firm founded by the former electoral strategist for David Cameron and Boris Johnson secretly pays journalists to write pieces for British newspapers that are favourable to their clients, a Guardian investigation can reveal.

In a practice that appears to create a backdoor for private companies to influence public opinion, lobbyists for CT Group - co-founded by the campaign strategist, Lynton Crosby - told an undercover reporter that they had paid journalists to place apparently independent stories in newspapers.