Word of warning.
CSM have molded the roof, part A9, with a beveled edge BUT the bevel does not reach all the way to the top of the edge. The result of this is that the roof tries to sit slightly more than half a mm too high.
The armoured visor for the driver will be lifted too high if it meets the hinges on the roof and leave a gap down to the horizontal plate in front of the visor.
Compare with the boxart, edge of roof not visible from the side, before you commit to glue.
The turret sits on a raised circle on the roof and the rear curved sections of A7 and A12 should extend upwards to cover the edge of the turret mounting plate. The fit of the rear doors also becomes a little sketchy.
DRY FIT carefully
This is a replica, not an original Lanchester AC, but I think they have done the roof and sides correctly.
Image from CSM’s website
Red points at plate joint.
Green points at raised edge of rear plate
Blue marks top of door

I get the impression that the rear half of A9 tries to be the raised turret plate and the forward half hasn’t realised that it should be a little bit lower.
Part A12:
Red line marks missing plate joint
Green area marks missing material


