Compulsory pilotage will apply to all vessels, all tows when navigating within the Harbour limits with the following exceptions:

Vessels of less than 40 metres
HM Ships and foreign warships
GLA tenders
Vessels shifting in berth (lines ashore)
Fishing vessels of less than 47.5 metres LOA

The provision of a Pilot is to be made through Holyhead Port Control a minimum of 24 hours prior to the vessels requirement.

Pilotage costings are laid down in Holyhead Port Charges. Port Charges 2019