You Do Need power plug adapter while traveling from Saint Vincent and the Grenadines to Great Britain.

Here is Why You Need An Adapter

The outlet and plug type used in Great Britain is G and in Saint Vincent and the Grenadines are A, B and G. This is how they look like.

Saint Vincent and the Grenadines

In Saint Vincent and the Grenadines, outlets of type A, B and G are in use.

Type A

Type B

Type G

Great Britain

In Great Britain, outlets of type G are in use.

Type G