Wellington Mark numbers in dispute

Hi all,

I have built a list of all Wellington Marks from various serial number sources, notably Robertson’s serials book and the Andrews&Morgan “Vickers Aircraft” book, and have been cross-checking these with other sources, notably the Air Britain serial series (though my collection of these is far from complete, so only one of those below has been checked).

There are a few aircraft whose identity does not match between difference sources, and I hope that some on this forum will be able to give a definitive answer to these – please tell me your information source if you can.

The aircraft in question are as follows:

AD589-AD653 (50 aircraft in total) – most sources have these as Mk.IIIs, one source has them as Mk.ICs (either is plausible)

DF542 – most sources have this as a Mk.III, one source has it as an early Mk.X

HX445 – Andrews&Morgan have this as a Mk.VIII, another source has it as a Mk.IC (this batch was a mixture of both Marks so either is plausible)

LN459-LN468 (10 aircraft in total) – some sources have these aircraft, others omit them – were they built?

LN633-LN634 (2 aircraft in total) – some sources have these aircraft, others omit them – were they built?

NB772 – NC234 (291 aircraft in total) – Robertson and Andrews&Morgan have these as Mk.XIV, Air Britain have them as Mk.X

NC420 disputed as a Mk.XIII or Mk.XIV (this batch was a mixture of both Marks so either is plausible)

Thanks for any supporting evidence for the true Mark of any of these aircraft.

Regards,

Iain.