  Mueller Navelet jets were proposed more than 25 years ago as a decisive test
of BFKL dynamics at hadron colliders. We here present a complete
next-to-leading BFKL study of the azimuthal decorrelation of these jets. This
includes both next-to-leading corrections to the Green's function and
next-to-leading corrections to the jet vertices. We compare our results with
recent data taken at the LHC and results obtained in a fixed order
next-to-leading-order (NLO) calculation.
