4. Get hold of a passport photograph, meeting these requirements:
http://www.usembassy.org.uk/cons_new/visa/niv/ photo.html
5. Phone 09042-450100 to make an appointment to attend the US embassy for interview (Calls are charged at �1.20 per minute from landlines, possibly more from mobiles. Lines are open 0800-2000 from Monday to Friday and 0900-1600 on Saturdays). When your partner phones he/she should have a credit card and his'her passport to hand. (NB: It must be a credit card. Debit cards are not accepted). Your partner will be given a date and time for the interview and probably asked to pay the $100 application fee. (This is a trial payment scheme. If he/she is not asked to take part, they'll have to wait until he/she attends for interview. He/she will then collect a form from the embassy and take it, with payment, to a nearby bank).
6. Attend the US embassy, in London, for an interview. Your partner should take his/her passport and all of the paperwork referred to in paragraphs 1 to 4, above. Also take 'evidence of sufficient funds to cover all expenses while in the United States' and evidence of some 'ties' with the UK. (i.e. evidence that he/she is likely to return here, such as proof of employment, property ownership, etc).