Air Ministry and successors operations record books for squadrons can be searched and downloaded. The records consist of record books that provide a daily record of events in each squadron including some photographs. There are also some Operations Record books for Dominion and allied air force squadrons under British Command. Though the system of Operations Record Books started after the First World War few books in this series date from before the mid 1930s.
Operation Record Books are a complete record of a unit from the time of formation, including an accurate record of operations carried out. The records are arranged by squadron number, and date and time of sortie or flight. Information includes aircraft type and number, names and rank of flight crew, names of passengers, weather conditions and flight/sortie details. It is possible to use these records to create a list of all the flying operations that RAF aircrew completed. Further details can be found at Squadron Operations Records
Titanic 1912 - 2012
The National Archives have also created a new page to commemorate the centenary, it includes biographical accounts of individuals on board, short videos and podcasts. The passenger and crew lists can be searched from across Titanic, Olympic (Titanic's sister ship) and Carpathia, the ship that rescued the survivors from the lifeboats. For further details and to search see Titanic passengers and crew
19th century merchant seamen records
findmypast has new merchant seamen records available. They cover the period from 1835 and 1857. Details that the records have include name, age, place of birth, physical description, ship names and dates of voyages. You will have to have a subscription or purchase credits.