What factors made britain less reliant on southern cotton, and thus less likely to support the southern war effort?

The Trent affair caused war between Britain and the U.S.
Huge cotton inventory & new sources of cotton made Britain less reliant on southern cotton, and thus less likely to support the southern war effort.

Britain accumulated a large supply of cotton before the war, so they didn't need any more and found new sources of cotton in Egypt and India. 
Europe's wheat crop failed, so Northern wheat&corn replaced cotton as an essential import.

Two confederate diplomats, Mason and Slidell, were on their thanks to Europe to do once more for support on a British bottom after they were stopped by General Wilkes on the San Jacinto and in remission.