You Do Need power plug adapter while traveling from Saudi Arabia 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 Saudi Arabia is G. This is how they look like.

Saudi Arabia

In Saudi Arabia, outlets of type G are in use.

Type G

British Virgin Islands

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

Type A

Type B