Do we need to bring Photocopy of all documents

[UKVisit]

Hi,

I am a contractor contracting through my limited company holding Tier 1 (G) Visa.

I will bring below documents to home office. Do I need to bring photocopy of all of them? There would be hell load of documents to copy.

1. Main Applicant Form
2. First Dependent Form
3. Second Dependent Form
4. Marriage Certificate (Do I really need it for extension as already produced during initial Tier 1 (G) application in March 2010??)
5. Son Birth Certificate (Do I really need it for extension as already produced during initial Tier 1 (G) application in March 2010??)
6. One bank statement for Earning
7. Other bank statement for maintenance
8. Payslips - 12 months
9. Dividend Declaration Forms
10. Accountant Reference Letter
11. Business bank Statement
12. Client Invoices
13. Company Registration Certificate
14. VAT Certificate
15. VAT Payments Invoices
16. Address Proof

Do you think that anything else required for any contractor to produce for Visa extn?

Thanks
Manish