Last moments of hero World War II pilot's life revealed in letter from German witness to his fiancée

http://www.dailymail.co.uk/news/article-1303810/Last-moments-hero-World-War-II-pilots-story-revealed-letter-German-witness-fiancee.html#ixzz0x2XTNGiA

Can anyone ID his Blenheim and the rest of his crew please?

Thanks