Virgin Media has been pulled up by two broadband news providers over its advertised upload speeds.
A report on Cableforum appeared to prove that although subscribers to the provider's cheapest 'M' package were meant to be able to upload data at 256Kb, this rate could in fact turn out to be just 200Kb.
The Register explained that this is down to Virgin Media's infrastructure, which is based on the two cable companies it is made up of - Telewest and NTL.
Those who are connected via the old Telewest base near Liverpool would have enjoyed the advertised speeds, whereas broadband users relying on the NTL site were seeing their upload rates fall short.
In a statement passed to the Register, Virgin Media explained: "Work to align minor differences in speeds across the NTL and Telewest customer bases is ongoing and should be complete very soon, along with further initiatives to reinforce our position as the UK's leading residential broadband service."