Databse of advertising/media agencies in UK

I am looking for a freelancer who could prepare a databse of: 1. Advertising agencies 2. Media agencies/Media buying agencies in the UK (starting with the biggest citites) All agencies that are focused mainly on the Internet (Interactive) or that have nothing to do with media buy are not considered, our focus are agencies provising complex services and/or involved in media purchase/planning process. The databse should be done in Excell or similar software (Open Office) and should include the following information: Name, Location, Core competence(s), E-mail, Contact form from website (URL), URL of the website, contact person/media buy department contact. It's difficult to say how many agencies should be found, but I estimate it of about 100. Please indicate your price and milestones. The time is not the main criterium, however it shouldn't be more than 2 months. Selection criteria are: price, milestones, rating, communication style, similar projects done in the past. The databse will be verified before the final payment, presentation of partial results obligatory, good English is necessary.