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

Here is Why You Need An Adapter

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

Myanmar (Burma)

In Myanmar (Burma), outlets of type A, C, D, G and I are in use.

Type A

Type C

Type D

Type G

Type I

United Kingdom (UK)

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

Type G