Specific Could anyone change a letter on this picture?

[clive]

Hi all,
Just wondering if anybody can change the letter underneath the gun turret to an A , again your help is much appreciated. I am compiling a photo book in remembrance to my Dad who served in the RAF during WWII.
Cheers Clive.

 

[polarwoc]

Would you know the name of the aircraft?

 

[clive]

View attachment 93571
Would you know the name of the aircraft?

Hi, thank you so much for this, i have never been able to find the name or even if it had one on Dad's Lancaster, he was a navigator with 166 Sqd.
Again thanks for your help with this - just what i wanted. Cheers Clive .