Do I qualify as a business for the purposes of Project Gigabit?
One in four local homes probably qualify as a business. It's likely if you fill in a tax return, you qualify. There’s no harm in applying as a business even if you're not sure as B4RN will do the research necessary.
Documentation DCMS will accept include:
VAT registration letter;
Sole Trader UTR number and scan of a letter from HMRC to confirm this;
Business bank account statement issued within the last three months;
Utility bill issued in the last three months;
Non-domestic rates reference
For more details see the Government's terms and conditions for the Gigabit Broadband Voucher Scheme here: Gigabit Voucher Terms and Conditions