Hi Malcolm
I wouldn´t take the illusion, but how can you identify that it is the Austin K2/Y Ambulance.
On the chassis is lorry cab, it looks like as GS lorry.
1st, take the measures of the chassis!! It looks like the K2 chassis or any more. The K2 has 192" and the K3 has 225" and 6/16"
2nd, find the shock suspenders, or the holes for the suspenders on the chasis, the axles have for the suspenders the eyes. Only the K2/Y Ambulance theyr have.
3th, the chassis No. will help more
Radek