You’ll need to decide which tank division you want to make as the decals cover desert rats, Irish Guard, a Canadian armoured division etc. The divisional symbol is usually placed on the rear right mud guard (but I’ve seen on the left as well). Some tanks also had the insignia on the front right as well, either on the mud guard or just inside the tracks on the hull.

On the opposite mud guard to the divisional insignia you should place the brigade number which is the numbers in the square decals. These changed a lot so unless you have a specific time or brigade you want to use, pick one of 51, 52 or 53 and use that (for the Desert Rats).

Usually you would put a big star on the engine deck (so aircraft could identify their targets) then some tanks had smaller stars on their sides but not all, this is more of a personal preference. A lot of the British tank crews didn’t like the star as they thought it was too American. Some tanks never had one and others were painted upside down as a protest.

The triangle, square and circle designate the tank Squadron as A, B or C respectively. I usually like all my tanks from the same squadron so stick with one type of shape. The decal goes on each side of the turret.

The small yellow circles with numbers in are the bridging weights and always go on the front to the left, usually low down. You need to put the correct bridging weight on each tank. All I can remember is the Churchill gets the biggest number as it is a lumbering beast.

Some of the Stuart tanks had the ID numbers on the rear on their flanks. I think this was more common in the US army, so I don’t bother for the British army.