The bf1942_battleofbritain_map.exe file you have requested: Maps Levels Missions / Multiple Game Types / A to B Titles / Battle of Britain Update - 44.35mb is not available. Perhaps try browsing all files for the game Battlefield 1942 and upload any files you want to share or are missing. This is the only information we could locate:
Battle of Britain is a Official Add-on Map for Battlefeild1942. This new iteration of the Battle of Britain map is to pre-empt an issue that would have arisen with the release of the 1.45 patch.