The well, which is owned by Total, was the subject of a £1m fine after another leak in 2012
Questions need to be asked about safety and protection of the environment, campaigners have said, after a leak in a North Sea well being drilled by the oil and gas firm Total.
The company may be forced to temporarily abandon part of the well owing to a gas leak beneath the seabed, which has restricted access to the wellhead at its Elgin B platform.