A report released by the IPPR's Centre for Cities in February 2006, "City Leadership: giving city regions the power to grow", proposed the creation of two large city-regions based on Manchester and Birmingham: the Birmingham one would cover the existing West Midlands metropolitan county, along with Bromsgrove, Cannock Chase, Lichfield, North Warwickshire, Redditch and Tamworth, while the Manchester one would cover the existing Greater Manchester along with the borough of Macclesfield.