The British Army registration would be or should be 37BA41.
Have a look in Pat Wares book on page 55 and see what shape the front side hatches r of 37BA24 (I can't find my book at the moment). Australian army registrations are not in order. Info from the old Ferret Scout Car site. 37BA47 has sloping side hatches. When did it change from square side hatches to sloped?
37BA30 Hull No 456, Mark 1, Transferred to the Australian Army and re-registered as 115163
37BA31 Hull No 457
37BA32 Hull No 458, Mark 1, Transferred to the Australian Army and re-registered as 115193
37BA33 Hull No 459, Mark 1, Transferred to the Australian Army and re-registered as 115192
37BA34 Hull No 460
37BA35 Hull No 461, Mark 1, Transferred to the Australian Army and re-registered as 115180
37BA36 Hull No 462, Mark 1, Transferred to the Australian Army and re-registered as 115177
37BA37 Hull No 463, Mark 1, Transferred to the Australian Army and re-registered as 115181
37BA38 Hull No 464, Mark 1, Transferred to the Australian Army and re-registered as 115178
37BA39 Hull No 465, Mark 1, Transferred to the Australian Army and re-registered as 115183
37BA40 Hull No 466, Mark 1, Transferred to the Australian Army and re-registered as 115179
37BA41 Hull No 467
37BA42 Hull No 468
37BA43 Hull No 469
37BA44 Hull No 470, Mark 1, Transferred to the Australian Army and re-registered as 115182
37BA45 Hull No 471, Mark 1, Transferred to the Australian Army and re-registered as 115138
37BA46 Hull No 472, Mark 1, Transferred to the Australian Army and re-registered as 115184
37BA47 Hull No 473, Mark 1, Transferred to the Australian Army and re-registered as 115185