You Do Need power plug adapter while traveling from Montserrat to Italy.

Here is Why You Need An Adapter

The outlet and plug type used in Italy are C, F and L and in Montserrat are A and B. This is how they look like.

Montserrat

In Montserrat, outlets of type A and B are in use.

Type A

Type B

Italy

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

Type C

Type F

Type L