“Mae refferendwm yr Undeb Ewropeaidd wedi creu ansicrwydd ac ansefydlogrwydd sy’n gallu niweidio hyder busnesau ac effeithio ar swyddi a buddsoddiad yn y tymor hir,” meddai.
“The EU referendum result has created uncertainty and instability which can damage business confidence and have a longer-term impact on jobs and investment,” he said.