One particularly frustrated customer in Doncaster had this to say:
Internet is completely unusable, so this is the THIRD night in a row that I am unable to fulfil my contractually obligated working from home via the internet, so a third night's overtime lost. Not only is this a pain, it's actually losing me wages
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This is actually not covered in the T&Cs of a residential broadband line. Infact using a residential line for business purposes is a direct breach of the T&Cs. While the person above is probably only doing some work from home and not using it for a business they are likely fine, they have no leg to stand on for lost income by being unable to connect for work. In this case Sky is safe to effectively say "oh boo hoo, you cannot work from home. Tough luck, not our problem."....fixing their overloaded network and contention issues, however, is their problem.
While working at BT for 7yrs the number of small businesses trying to use a residential BB package for the business was staggering. Any time someone got indignant on the phone with me about losing money blah blah blah, I would remind them it is a residential line and using it for their business was a breach of their T&Cs. If they wished I would connect them to BusinessBB sales so they could move/upgrade their service to the business product.