A French woman with no government or port affiliations turned a vessel from Alderney away from a French port.
The Bailiwick boat skippered by Lewis Main was attempting to land at Cherbourg yesterday.
In a statement Deputy Neil Inder said:
"On 1 December the Bailiwick issued 40 fishing licences in accordance with the UK-EU Trade and Cooperation Agreement (TCA), with track records approved for three vessels where licences were not initially sought.
These licences were issued in accordance with the requirements of the TCA.
This has been welcomed by the European Commission and the French Government as well as by the Normandy authorities including the Normandy fishing committee.
There has been no official policy change on landing in EU designated ports but disruption from non-governmental sources cannot be ruled out.
Disruption caused by individuals is extremely disappointing, given our commitment to transparency in the processing of licences and our aim of providing stability to the fishing economy within our joint region."
French officials are said to have condemned the actions of the person concerned.
Three comedians added to Guernsey Literary Festival line-up
Guernsey's hospital moving away from laughing gas anaesthesia
Guernsey hosts global Indoor Bowls competition
Guernsey rugby player selected for Scotland under 17s
Record number of seal pups being looked after by the GSPCA
Inspection reports Hautes Capelles School in Guernsey as 'good'
Route for Guernsey's Liberation Day Cavalcade revealed
Herm CEO stepping down
