Question: who are wifi service providers?
Answer: BT Broadband. The UK's largest provider of broadband services, BT offers a range of deals with average speeds of up to 67Mbps in London. ... 
EE Unlimited Broadband. ... 
Plusnet. ... 
Sky Broadband. ... 
TalkTalk. ... 
Vodafone Broadband. ... 
How fast is London broadband? ... 
What broadband speed do I need?