The Carbon Disclosure Project, Cities-2012 has just been published. I have only skim-read it, but one glaring error is the fact it has a report from Greater Manchester not the City of Manchester. Further down in the Appendix, it does have the City of Manchester but the data relates to Greater Manchester. So, how reliable can we believe this document to be. As usual it is mostly about what City Authorities say they are going to do, not what they have actually achieved. With regards to the City of Manchester, basically nothing.
The did issue a report criticising the UK Governments lack of action on making reporting of carbon emissions mandatory.