Here are the contact details for the British Embassy in Athens:

Athens
British Embassy
1 Ploutarchou Street, 106 75 Athens
 FTN Code - 8542 + extn number (switchboard: 8542 1000)
Telephone: (00) (30) 210 727 2600
Night (RSO): (00) (30) 210 723 7727
Facsimile: (00) (30) 210 727 2734 Political & Commercial Section
2720 Consular Section
2876 Management Section
2723 Chancery/Political
2743 Press & Public Affairs
2725 Residence
2727 Fiscal & Drugs Liaison Section
Airtech: (00) (30) 210 722 7122
e-mail:  information.athens@fco.gov.uk
Website:  http://www.british-embassy.gr

Office Hours (GMT): 06 00 - 13 00

Ambassador: Mr Simon L Gass, CMG, CVO
Consul-General, Deputy Head of Mission: Mr Ian Whitting
Counsellor: Mr Nicholas Langman
Defence & Naval Attaché: Captain John R Wills, RN
Military & Air Attaché: Colonel Mark Blatherwick, MBE, GM
Counsellor (Cultural) (British Council Director): Mr Desmond Lauder
First Secretary (Head of Press & Political Section): Mrs Tracy Gallagher
First Secretary (Political/Information): Mr Daniel Tarshish
First Secretary (Defence Supply): Mr John Bewley
First Secretary (Management): Mr Keith McMahon, MBE
First Secretary (Commercial): Mr Frank Jones
First Secretary & Consul: Mr Donald Holder (Susan Mary Morrell w.e.f Sept 05)
First Secretary (Cultural Affairs): (Vacant)
Drugs Liaison Officer: Mr Nick Jepson
Second Secretary & Vice-Consul: Mr Andrew Self
Second Secretary (Political/Information): Ms Lynda Burns
Second Secretary: Mr Nigel Willmer
Second Secretary (EU): Ms Beverley Darkin
Third Secretary (Management): Ms Joanne Crabtree
Third Secretary & Vice-Consul: Mrs Patsy McQuilton

The contact details are provided in the document "HM Diplomatic Service Overseas Reference List" available here:

 http://www.fco.gov.uk/Files/kfile/Overseas%20Reference%20List%20-%20July-August%202005.doc

and here:

 http://www.fco.gov.uk/Files/kfile/OverseasRefListJulyAug2005.doc