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

North Cyprus

In North Cyprus, 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