an rfu disciplinary panel dismissed a charge that vunipola had recklessly led with his head in a incident which left the leicester full back matehw tait with his head .
the england no 8 free to face clermont auvergne in saturday 's champions cup semi-final .
saracens are the last remaining english club in the competition and would have appealed against the decision if their in-form england star had been banned .
billy vunipola trains in the spring sunshine on tuesday as saracens prepare for saturday 's clash .