Avro Lancaster was the main night raid heavy bomber of RAF in WW II. Only two planes like that are still flying today.\r<br>\r<br>\r<br>\r<br>Visit The War Years The British Avro Lancaster was a four-engine Second World War heavy bomber made initially by Avro for .\r<br>\r<br> In 1941 Charles Portal of the British Air Staff advocated that entire cities and .