Thank you everyone for the comments. Very much in line with my first thoughts when I inspected the model.
Before I come to the axle ends, I'll attempt to answer the queries regarding the baseplate, axles & wheels.
(yellowfoden, ghost hunter) Yes, I believe at some point it has been stood upon or compressed. The centre pillar of the windows is bent in and outside pillars bent out. As pointed out there is evidence of paint stress.
The cab rear is lower and not in line with the crate bed supporting the idea of being pushed down from around the top decal board. Though there does not appear to be much damage apart from a small chip.

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The baseplate is secured by the spread rivet and not glued. I've inspected the end of the baseplate that curves around the rivet and it does not appear to be broken off as the black paint extends over the edges, apart from a small area near the rivet. I've tried gently applying pressure to see if it would pop out in the case of someone removing and repainting but it will not go over the rivet. The paint and finish appears consistent with my other models.

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(motorman) I measured the axles and they are parallel, think it just the angle I photographed.
(Idris) The rear off-side wheel is OK, again it's my camera angle.
(sms88) Re the Lesney pip view IMG 5796 - appears to be pip there.
AXLES
In line with forum comments I immediately thought replacement wheels & hand peened axle ends.
I thought I would then check other models from around the same time period (circa 1960) to see if similar ends appeared.
When I started looking I found a whole range of different ends (Nick, could be a new discussion strand here

).
The ends ranged from well formed rounded ends to almost flat ends. So I tried to find out how the ends were formed.
Read throughout the 40 Year book and on page 53 it mentions wheeling machines being built from 1966 (not sure if it refers to axles or creation of wheels). It also mentions pressing or spinning rivets. I also viewed some old videos to get a clue as to how the ends were created. In one of the clips it appears to show a hand operated press
http://blog.hemmings.com/index.php/2014 ... hbox-cars/.
Frank Carnahan
http://www.fcarnahan.com/pg/wheels.html ... r%20wheelsmentions that change over to rounded ends occurred in 1958.
A common feature of the ends was centre dimple and what appears to be tooling marks that would support the ideas of a press.
A RANGE OF ENDS
I examined about 60 models (then exhaustion set in).
I was going to title each model but I'll leave it you to play guess the model. Haven't included all the photos but here are examples.

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Found many examples where the ends were not consistent e.g. one axle pressed the other pre-formed, perhaps supporting hand done rather than an automatic process.

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From all of this I would like to make some observations.
Axle end production was not a consistent, conformed process.
It was probably hand done in the initial period of change over from crimped to rounded.
If a press was used & hand operated is it likely that errors in alignment would occur in the process?
There are a significant percentage of models that exhibit unformed/irregular ends.
Does this alter how we look at similar examples that have appeared on the forum?
I've got a lot of modified models in my collection

.
Thanks, if you're still reading/viewing this. If this is a home made model I've still got value from it from the research I have done and what I have found out. My next step is to contact the seller and ask about the provenance of the model to see if that sheds any light.
I look forward to any comments that anyone would like to offer.
Rodger