The Bank’s Macro-Econometric model has recently been revised. This paper outlines the context within which the model was initially built and the reasons for the revision and re-estimation. Compilation of the data used was a key component of the revision and this is described. The general structure of the model is outlined. Key equations are described and estimation issues noted. A discussion on simulating the model is provided along with results from sample simulations. The paper concludes with a discussion of how future work on the model might evolve.