The Electoral Commission provide a series of comprehensive guides and resources to support candidates and agents:-

Document Title Link
Overview for candidates and agents

http://www.electoralcommission.org.uk/i-am-a/candidate-or-agent/combined-authority-mayoral-elections

Part 1: Can you stand for election in Cambridgeshire & Peterborough

This part covers:

Qualifications for standing for election

Disqualifications from standing for election

http://www.electoralcommission.org.uk/__data/assets/pdf_file/0006/214467/CAM-Part-1a-Can-you-stand-for-election-without-PCC-function.pdf

Part 2a: Standing as an independent candidate

This part covers:

Completing and submitting your nomination papers

What happens after the close of nominations?

Appointing your election agent and other agents

http://www.electoralcommission.org.uk/__data/assets/pdf_file/0007/214468/CAM-Part-2a-Standing-as-an-independent-candidate.pdf

Part 2b: Standing as a party candidate

This part covers:

Completing and submitting your nomination papers

The mayoral address and deposit

What happens after the close of nominations

Appointing your election agent and other agents

http://www.electoralcommission.org.uk/__data/assets/pdf_file/0008/214469/CAM-Part-2b-standing-as-a-party-candidate.pdf

Part 3: Spending and Donations

This part covers:

How much you can spend

The activities covered by the rules

Which donations you can accept

How to check donations you receive

What information needs to be recorded and reported

http://www.electoralcommission.org.uk/__data/assets/pdf_file/0019/214471/CAM-Part-3-spending-and-donations.pdf

Part 4: The Campaign

This part covers:

Campaigning dos and don'ts

Using the electoral register and absent voters' lists

Using schools and rooms for public meetings

Imprints on campaign publicity material

The mayoral address

Polling day dos and don'ts

Reporting allegations of electoral malpractice

http://www.electoralcommission.org.uk/__data/assets/pdf_file/0020/214472/CAM-Part-4-The-campaign.pdf

Part 5: Your Right to attend key electoral events

This part covers:

Attending the opening of postal votes and what to expect

Attending polling stations and what to expect

Attending the count and what to expect

http://www.electoralcommission.org.uk/__data/assets/pdf_file/0003/214473/CAM-Part-5-Your-right-to-attend-key-electoral-events.pdf

Part 6: After the declaration of results

This part covers:

Making the declaration of acceptance of office

Access to election paperwork

Submitting your spending returns and declarations

Questioning the result through an election petition

http://www.electoralcommission.org.uk/__data/assets/pdf_file/0004/214474...

Guidance for non-party campaigners – i.e. individuals and organisations who want to campaign in the run-up to the election but not standing as a political party or candidate - is also available on the Electoral Commission's website here.