A prominent Eurosceptic, Bone has often been named as a potential defector to the United Kingdom Independence Party. Bone described UKIP's emergence as a "good thing for British politics", and criticised his own party for "neglecting" the views of traditional Conservatives on other issues such as immigration, but said he intended to campaign for withdrawal from the EU from within the Conservative Party. Bone is a director of Grassroots Out and was a director of the now dissolved Go Movement Limited with Nigel Farage and Tom Pursglove.