Let H be a complex separable Hilbert space with
$\dim H \geq 2$
. Let
$\mathcal {N}$
be a nest on H such that
$E_+ \neq E$
for any
$E \neq H, E \in \mathcal {N}$
. We prove that every 2-local isometry of
$\operatorname {Alg}\mathcal {N}$
is a surjective linear isometry.