You Do Need power plug adapter while traveling from Central African Republic to Northern Ireland.

Here is Why You Need An Adapter

The outlet and plug type used in Northern Ireland is G and in Central African Republic are C and E. This is how they look like.

Central African Republic

In Central African Republic, outlets of type C and E are in use.

Type C

Type E

Northern Ireland

In Northern Ireland, outlets of type G are in use.

Type G