You can find a map to all the POI'S that you many need to as your time on PD on the link below.

POI map 

The Met PD use state codes to easily communicate with other officers to make sure the Police radios don’t get clogged up with talking. 

State 2:On Patrol - This state code is for when you have just clocked on and are going on patrol or you are finished at a scenario and you are going back on patrol

Example: CPC-1 State 2 any current situations

State5:On route to a situation - This state code is used when you are on the way to a situation to let other officers know you are making your way there.

Example: CPC-1 State 5 to the latest panic

Example 2: CPC-1 State 5 to the latest 999 call.

State 6:On Scene - This state code is used when you are arriving at a situation.

Example: CPC-1 State 6 at the latest Panic

Example 2: CPC-1 State 6 at the latest 999 call.

State 15:Received - This state code is used when an officer is giving you information over the radio for them to know you have received the information they are giving you.

Example: State 15 CPC-1 (Person giving you the information)

State 16:Repeat last communication - This one is similar to State15 except you use this one if you need the officer to repeat the information he is giving you.

Example: State 16 CPC-1 (Person giving you the information)please