  A high intensity source of a single neutrino flavour with known spectrum is
most desirable for precision measurements, the consensus direction for the
future. The beta beam is an especially suitable option for this. We discuss the
prospects of a very long baseline beta beam experiment with a magnetized iron
calorimeter detector. In particular, with the source at CERN and the detector
at the proposed India-based Neutrino Observatory (INO) the baseline is near the
`magic' value where the effect of the CP phase is small. We observe that this
experiment will be well suited to determine the sign of $m_3^2 - m_2^2$ and
will be capable of probing $\theta_{13}$ down to about 1$^\circ$.
