British army trucks of the 30s. Identification

[Konstantin Chernov]

1-3. Morris Commercial R . Imperial war museum Duxford.
4. Morris Commercial R 12-15 cwt. Vanderveen 1974.This vehicle differs from the previous one in the headlight mounts. Probably the correct designation of this model is R.10/15, where the first number is the wheelbase in feet, the second is the load capacity in centners
5. Morris Commercial R 12-15 cwt (?).This is how this truck was labeled at the Beverly Army Transport Museum when it was on display there. I don't know if this is the correct label. This truck is distinguished by its “civilian” cabin, the location of the parking lights and the absence of a perforated partition under the radiator. Could this be a 30 cwt?
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