In the UK I understand that BT one of the largest providers here do not throttle - this is from their BT’s approach to broadband traffic management
At busy times, internet providers can slow down traffic on the network. This is called ‘traffic management’ and it’s a way of making sure you get the best possible service.
We’re proud to say that our broadband packages don’t have any speed restrictions. So, if you’re on one of our packages, you don’t need to worry about us slowing you down even at peak times. We won’t slow down peer to peer file-sharing either, so share away.
If you want to know more, check out our Key Facts Indicator tables below or visit the Ofcom website >
We’ve also signed up to a voluntary code of practice which aims to make traffic management easier to understand.
Hope that’s useful for UK users who are concerned about his issue