The Charity Commission, a useful source of information and guidance for charities.
Russell Platt Associates fundraising consultants based in Manchester, I have worked with Charlotte Platt and can highly recommend her
Companies House Web Check, check when your company accounts and annual return are due.
Cooperatives UK, a useful source of information for cooperatives and people setting up organisations in the voluntary sector.
The Charity Service, a Manchester based charity providing a range of services to other charities.
Slade and Cooper, my old employer and a firm of registered auditors specialising with charities and the Third Sector.
Des Gregory at green h provides websites (including this one), databases and IT services for small third sector organisations, businesses, independent professionals and sole traders.