Milford Haven Port, which handles around 20 per cent of the UK’s fuel requirements, reported a pre-tax profit of £8.1m on a turnover of £29.5m in 2011, up from £7.1m on a turnover of £27.8m in 2010.
A spokeman for the port said the results were partly attributed to 'increased fuel demand' last winter.
They added that results are expected to be less encouraging for the year ahead, due to a fall in the amount of gas being handled there, as well as the need to invest more into pension funds.
More top news
A video obtained by ITV Wales shows a man being detained on a residential street in Newport following a counter-terrorism raid in the city.
A 25-year-old man has been arrested in Newport, South Wales, in connection with the Parsons Green terror attack, Scotland Yard said.
Tata Steel and Thyssen Krupp will formally announce the merger of their European steel operations on Wednesday, ITV News understands.