UK Maritime and Coastguard Agency (MCA) inspectors have begun checks on the P&O Ferries-operated Dover-Calais ship, Spirit of Britain.
Inspections of P&O Ferries’ vessels can take up to two days, according to the MCA, but no further checks on its ferries are planned at the moment.
Of the eight to be inspected, Pride of Hull and European Causeway have both been cleared to resume operations on the Hull-Rotterdam and Larne-Cairnryan trades, respectively.
Pride of Kent, which operates out of Dover, failed its initial MCA inspection and remains under detention, said the MCA, while four other ferries are yet to have their inspections.
Meanwhile, the port of Dover authorities, along with other ferry operators Irish Ferries and DFDS and Eurotunnel, have made plans to keep Easter holiday traffic moving through South-east England, following days of truck queues that eased last weekend.