  21cm intensity mapping is a novel approach aimed at measuring the power
spectrum of density fluctuations and deducing cosmological information, notably
from the Baryonic Acoustic Oscillations (BAO). We give an update on the
progress of BAO from Integrated Neutral Gas Observations (BINGO) which is a
single dish intensity mapping project. First we explain the basic ideas behind
intensity mapping concept before updating the instrument design for BINGO. We
also outline the survey we plan to make and its projected science output
including estimates of cosmological parameters.
