You Do Need power plug adapter while traveling from Latvia to British Virgin Islands.

Here is Why You Need An Adapter

The outlet and plug type used in British Virgin Islands are A and B and in Latvia are C and F. This is how they look like.

Latvia

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

Type C

Type F

British Virgin Islands

In British Virgin Islands, outlets of type A and B are in use.

Type A

Type B