Tanker owners with protection and indemnity cover placed with the International Group of P&I Clubs are banging the desks in anger because their transit through the Bosphorus is being delayed by insurers’ refusal to provide written guarantees to the Turkish authorities.

The International Group’s 13 member clubs are declining Turkey’s request that they provide a letter guaranteeing cover will be provided to shipowners “under any circumstances” during the duration of the transit through the Bosphorus.