Here's a little more info - I'm keen on building LM220 WS-Y "Getting Younger Every Day" of 9 Squadron. I haven't come across any photos showing the bomb doors yet, but here's what I've got so far. First pic shows the plane after its bombing of the Tirpitz:
The next one shows the flight crew perhaps not long after they received this bomber from its former crew, prior to Tirpitz:
Here's a drawing I found showing it with bulged bomb doors, middle turret removed and no ventral turret:
And another drawing, somewhat similar:
I also some info recorded by the younger brother of the pilot, Douglas Tweddle, who explained that the middle turret was removed for the Tirpitz missions, in an effort to reduce weight for the long flight from Russia.
This is all the info I have so far on the plane, and I'm still hoping to get more details on the bulged bomb doors. EDIT: Also, i am interested in modelling this as a pre-Turpitz plan and will include the middle gun. Hoping someone might have some images of this plane to share. Cheers!