flags containing union jack

The following 23 countries's flags include the Union Jack:

Akrotiri
Anguilla
Ashmore and Cartier Islands
Australia
Bermuda
British Indian Ocean Territory
British Virgin Islands
Cayman Islands
Coral Sea Islands
Dhekelia
Falkland Islands
Fiji
Heard Island and McDonald Islands
Montserrat
New Zealand
Niue (with embellishments)
Pitcairn Islands
Saint Helena
South Georgia and the South Sandwich Islands
Tokelau
Turks and Caicos Islands
Tuvalu
United Kingdom