Code of Practice - Tesco Broadband & Homephone
OFCOM General Condition 24
Code of Practice regarding Premium Rate Services, Number Translation Services, 0870 calls and Personal Numbers  
Code of Practice for Complaints
Code of Practice for Migration 

See also:
Tesco Broadband Fair Usage & Traffic Management Policies
Tesco Broadband and Tesco Home Phone Pricing
Tesco Broadband and Tesco Home Phone Terms & Conditions