Vodafone has been fined after pleading guilty to offences linked to roadworks in Borough High Street and St Thomas Street earlier this year.
Vodafone's offences, which took place between February and March this year, include working without a permit in Borough High Street and failing to serve the required streetworks notices before starting work at St Thomas Street in Southwark, Loampit Vale in Lewisham and Bishopsgate in the City of London.
Vodafone failed to pay the fixed penalty notices issued by Transport for London in response to these offences.
Ahead of a hearing at Westminster Magistrates Court on 28 September, Vodafone pleaded guilty to the offences and the company was fined a total of £3,500 and ordered to pay prosecution costs of £3,020.
Garrett Emmerson, TfL's chief operating officer for surface transport, said: "These offences prevent us from coordinating streetworks effectively and we will continue to push for the toughest penalties possible against telecommunications and other companies caught acting unlawfully.
"We are committed to keeping London's roads as clear as possible to prevent unnecessary disruption to journeys and to help us tackle poor air quality."