Most of the foreign embassies are present in London. For a complete list of contact details, visit: https://www.gov.uk/.
Here is a list of the G-20 embassies and their websites, phone numbers and addresses. The ambassy addresses only are stated below, it is not uncommon for the visa section to be elsewhere in the city, please check the website link.
Phone number include the international code if dialing from the UK simply dial 020 followed by the 8 digit number.
Argentina
http://www.argentine-embassy-uk.org
65 Brook Street
London W1K 4AH
Tel. + 44 (0) 20 7318 1300
Fax. + 44 (0) 20 7318 1301
Australia High Commission
http://www.uk.embassy.gov.au/
Australia House
Strand
London WC2B 4LA
Tel: + 44 (0) 20 7379 4334
Fax: + 44 (0) 20 7240 5333
Brazil
http://www.brazil.org.uk
14-16 Cockspur Street
London SW1Y 5BL
T : + 44 (0) 20 7747 4500
F : + 44 (0) 20 7747 4555
Canada High Commission
http://www.canadainternational.gc.ca/
Macdonald House
1 Grosvenor Square
London, W1K 4AB
Tel: + 44 (0) 207 258 6600
Fax: + 44 (0) 207 258 6333
China
http://www.chinese-embassy.org.uk/eng
49 Portland Street
London W1B 1JL
Tel: + 44 (0)20 7299 4049
France
http://www.ambafrance-uk.org/
58 Knightsbridge
London SW1X 7JT
Tel: + 44 (0) 20 7073 1000
Germany
http://www.london.diplo.de
23 Belgrave Square
Knightsbridge, London SW1X 8PZ
Tel: + 44 (0) 20 7824 1300
India
http://www.hcilondon.in
High Commission of India
India House
Aldwych
London WC2B 4NA
Tel: + 44 (0) 20 7836 8484
Fax: + 44 (0) 20 7836 4331
Indonesia
http://www.indonesianembassy.org.uk
38 Grosvenor Square
London W1K 2HW
Tel : + 44 (0) 20 7499 7661
Italy
http://www.amblondra.esteri.it/
14 Theww Kings Yard
London @1K 4EH
Tel: + 44 (0)20 7312 2200
Fax: + 44 (0)20 7312 2230
Mexico
http://embamex.sre.gob.mx/reinounido
16 St. George Street,
London W1S 1LX
Tel: 020 7499 8586
Fax: 020 7495 4035
Russia
http://www.rusemb.org.uk
6/7 Kensington Palace Gardens
London W8 4QP
Tel: + 44 (0) 20 7229 6412
Fax: + 44 (0) 20 7727 8625
Saudia Arabia
http://www.mofa.gov.sa/
30 Charles Street
London W1J 5DZ
Tel (0)20 7917 3000
South African High Commission
http://southafricahouseuk.com
South Africa House
Trafalgar Square
London WC2N 5DP
Tel: + 44 (0) 20 7451 7299
Fax: +44 (0) 20 7839 5670
South Korea
http://gbr.mofa.go.kr/
60 Buckingham Gate
London SW1E 6AJ
Tel: +44 (0)20 7227 5500
Fax: +44 (0)20 7227 5504
Turkey
http://london.emb.mfa.gov.tr
43 Belgrave Square
London SW1X 8PA
Tel: +44 (0)20 73 93 02 02
Fax: +44 (0)20 73 93 00 66
United States
http://www.usembassy.org.uk
24 Grosvenor Square
London W1K 6AH
Tel: + 44 (0) 20 7499 9000
