Brexit campaigner Arron Banks says his tweet about "freak yachting accidents" was a joke.Read more
The company which the Electoral Commission suspects may have been behind Britain's biggest political donation has no registered address - meaning it has failed to fulfil a key legal requirement - the BBC has found.
Rock Holdings is a firm registered in the Isle of Man and controlled by Leave.EU founder, Bristol-based Arron Banks.
The Electoral Commission's ongoing investigation of Leave.EU funds was referred to the National Crime Agency.
Mr Banks denies any wrongdoing.
Leave.EU co-founder Arron Banks tells the BBC all the money he donated to the campaign was UK-generated.