The Nazis had decreed that the evacuations must not block ports in Germany, so most transport parties went by train to the Netherlands; then to a British port, generally Harwich, by cross-channel ferry from the Hook of Holland near Rotterdam. From the port, a train took some of the children to Liverpool Street station in London, where they were met by their volunteer foster parents. Children without prearranged foster families were sheltered at temporary holding centres at summer holiday camps such as Dovercourt and Pakefield. While most transports went via train, some also went by boat, and others aeroplane.