Anyone from these countries who is resident in the UK can register to vote.
Austria
Belgium
Bulgaria
Cyprus
Czech Republic
Denmark
Estonia
Finland
France
Germany
Greece
Hungary
Ireland
Italy
Latvia
Lithuania
Luxemburg
Malta
Netherlands
Poland
Portugal
Romania
Slovakia
Slovenia
Spain
Sweden
United Kingdom
Commonwealth countries
Antigua and Barbuda
Australia
The Bahamas
Bangladesh
Barbados
Belize
Botswana
Brunei Darussalam
Cameroon
Canada
Cyprus*
Dominica
Fiji Islands**
The Gambia
Ghana
Grenada
Guyana
India
Jamaica
Kenya
Kiribati
Lesotho
Malawi
Malaysia
Maldives
Malta*
Mauritius
Mozambique
Namibia
Nauru
New Zealand
Nigeria
Pakistan
Papua New Guinea
Rwanda
St Kitts & Nevis
St Lucia
St Vincent & The Grenadines
Samoa
Seychelles
Sierra Leone
Singapore
Solomon Islands
South Africa
Sri Lanka
Swaziland
Tonga
Trinidad & Tobago
Tuvalu
Uganda
United Kingdom
United Republic of Tanzania
Vanuatu
Zambia
Zimbabwe**
British Overseas Territories
Anguilla
Bermuda
British Antarctic Territory
British Indian Ocean Territory
British Virgin Islands
Cayman Islands
Falkland Islands
Gibraltar
Montserrat
Pitcairn Island
St Helena and dependencies (Ascension Island and Tristan da Cunha)
South Georgia and the South Sandwich Islands
Sovereign base areas on Cyprus
Turks and Caicos Islands