You Do Need power plug adapter while traveling from United Kingdom (UK) to Iraq.

Here is Why You Need An Adapter

The outlet and plug type used in Iraq are C, D and G and in United Kingdom (UK) is G. This is how they look like.

United Kingdom (UK)

In United Kingdom (UK), outlets of type G are in use.

Type G

Iraq

In Iraq, outlets of type C, D and G are in use.

Type C

Type D

Type G