Please see the most recent updates in the "Where did the .com name go?" thread. Posts number 16 and 17.
Looks okay so far, though I can't see how well the asymmetric fuselage cross-section forward of the cockpit has been executed. That will be a measure of the model, to my mind.
Maybe a little late in the day, but would it not be an idea to have the rounded wing extensions ? You would then have the ultimate B.Mk.III and the Halifax that finally matched the Lancaster.
I have now added the wing extensions, so it is indeed a MkIII