British Cycling team manager John Herety has resigned following a row over team tactics at September's World Road Championships in Madrid.
Southam's tactics were 'totally unacceptable'
British riders Tom Southam and Charly Wegelius were found to have supported their Italian professional team-mates rather than Roger Hammond in Madrid.
Herety said: "Mistakes were made and it was appropriate for me to resign."
After an inquiry, British Cycling reprimanded Southam and Wegelius for their "unacceptable" behaviour.
British Cycling performance director Dave Brailsford, who carried out the inquiry, added: "The men's road team was chosen with a clear strategy, which identified a single team leader in Roger.
"The remaining riders in the team were expected to totally dedicate their efforts to supporting him.
"In the event, both Tom and Charly ignored this team strategy, an act which was totally unacceptable.
"They both recognise that they made a grave error in judgement and while they have apologised, this type of behaviour will not be tolerated now or at any time in the future."