Information about ships from England

i have successfully found two Norwegian relatives who emigrated from Norway - one in 1903 and one the 1905. One was left Kristiania on 10 July 1903 on the Montebello. The other left Kristiania on 17 Mar 1905 on the Angelo. Both ships were in the Wilson line and their agents were H. Heitmann. But I am lost now when they get to Hull. How do I find out which ship they may have been on when they left England - from Liverpool or London or Southampton or even if it was Glasgow? Any links you know of where I can check?