Ulster captain Rory Best returns for Sunday's crucial European Cup clash at Gloucester after making a dramatic recovery from an ankle injury.
The hooker, named in the Ireland squad for the RBS 6 Nations, is one of eight changes made by caretaker coach Steve Williams despite Best not being expected to return to action for another couple of weeks, after injuring his ankle in the Boxing Day clash against Leinster in Dublin.
Gloucester welcome back wing Lesley Vainikolo in a game they need just to draw to progress.
The former rugby league star has recently been named in England's RBS 6 Nations squad but has not played since 29 December, after the death of his father.
After losing their Under-20s Six Nations crown to England Under-20s in a thrilling final round, France Under-20s lock Tristan Labouteley insists his side will be out for revenge at this year's Junior World Championship.