Survivability rates of Crew Positions
when shot down Jan-Jun 1943

You can see that Halifax crews stood a better chance of escaping from their stricken craft than their Lancaster colleagues. The Lancaster design had a less roomy interior , smaller escape hatches, tended to catch fire and break apart in mid-air more readily than the Halifax. Which explains why 29% of Halifax crews survived being shot down and only 10.9% of Lancaster crews survived. Pilots, who usually stayed at the controls while the rest of their crew tried to bale out, generally had the worst survival rate of all. Source of info is 'The Crucible of War 1939-1945: The Official History of the RCAF Volume III, University of Toronto Press 1994