Cabinet Office Ministerial Responsibilities
This Ministerial Responsibilities website lists all the UK government ministers and provides details of each of their individual responsibilities, as well as contact details for their private offices.
The site also provides a list of government whips and government spokespersons in the House of Lords, and details of executive agencies and the government offices for the regions.
Details of ministerial salaries can be found on the Civil Service Parliamentary Pay and Allowances website.