  We study the perturbative quantisation of N=8 supergravity in a formulation
where its E7(7) symmetry is realised off-shell. Relying on the cancellation of
SU(8) current anomalies we show that there are no anomalies for the
non-linearly realised E7(7) either; this result extends to all orders in
perturbation theory. As a consequence, the e7(7) Ward identities can be
consistently implemented and imposed at all orders in perturbation theory, and
therefore potential divergent counterterms must in particular respect the full
non-linear E7(7) symmetry.
