Two-thirds of UK consumers are failing to receive the download speeds they expected when signing up for their broadband deal.
In a survey conducted by ISPreview.co.uk, just 32.4 per cent of respondents said the speeds they receive were in line with the original estimate from their broadband provider.
The majority of households said they were receiving slower speeds, with a quarter (25 per cent) reporting download capabilities between 7Mb and 10Mb slower than expected.
For another 21 per cent, average speeds are between 4Mb and 6Mb slower.
However, around one in nine consumers (11.4 per cent) said they were benefiting from faster services than those originally predicted.
Mark Jackson, Editor at ISPreview.co.uk, explained that a number of factors can lead to fluctuations in broadband speeds, including network congestion and line quality.
But he said consumers should be given greater protection against extreme losses of broadband performance.
This is especially important for occurrences outside the first three months of a new broadband deal, Mr Jackson noted.