Broadband providers must give you a realistic estimated speed, which you are likely to get during busier times of the day. Under rules set by the Advertising Standards Authority (ASA), at least 50% of broadband customers should be able to achieve a deal’s advertised speeds during peak times, which Ofcom defines as between 8 and 10pm.
Providers must also include a minimum guaranteed speed when you buy your broadband service. If you find that your speeds don’t match this and your provider can’t fix the fault in 30 days, you have the right to leave your contract without paying a penalty.