Telecoms regulator Ofcom has announced a new code of practice for broadband providers designed to give clearer information on likely speeds.
Under the rules, 32 suppliers servicing 90 per cent of the broadband market have voluntarily agreed to provide better advice for consumers over download rates and ensure that customers are on the right plan.
Ofcom announced the new code following concerns that advertising practices of some providers were misleading customers. It particularly advised against the promotion of headline speeds that were unlikely to be achieved by most people.
As a result of this concern, the rules require providers to supply "customers at the point of sale with an accurate estimate of the maximum speed that the line can support, whether it is in the shop, over the internet or on the phone".
Broadband companies will also be required to provide additional support to resolve technical issues to improve speeds.
Last month, Ofcom announced that it would support the deregulation of 70 per cent of the UK broadband market.