You Do Need power plug adapter while traveling from Vatican City to Falkland Islands.

Here is Why You Need An Adapter

The outlet and plug type used in Falkland Islands is G and in Vatican City are C, F and L. This is how they look like.

Vatican City

In Vatican City, outlets of type C, F and L are in use.

Type C

Type F

Type L

Falkland Islands

In Falkland Islands, outlets of type G are in use.

Type G