  We study contributions to $pp\to W^+W^- \to \ell\nu_\ell
\ell^\prime\nu_{\ell^\prime}$ in models with a new Higgs boson, $H$, and a
neutral lepton, $\nu_{4}$, with couplings $H-\nu_{4}-\nu_{\mu}$ and
$W-\nu_{4}-\mu$ through the process $pp \to H \to \nu_4 \nu_\mu \to W \mu
\nu_\mu \to \ell\nu_\ell \mu \nu_\mu$. Contrary to naive expectations, we find
that contributions to $pp\to WW$ can be very large while satisfying constraints
from standard $H\to WW$ and $H\to\gamma\gamma$ searches. Even the excess
observed by ATLAS in $pp\to WW$, if taken at face value, can be easily
accommodated. The various kinematic distributions fit nicely the experimentally
determined ones. This scenario can arise for example in a two Higgs doublet
model with vectorlike leptons.
