As frustrating as it may seem, follow what the recruitment consultants told me when I walked into an agency and that is to apply online. Personally, I have found Reed to be the best so far. A few tips from me are, though it may seem painstakingly difficult and monotonous to keep applying (go through the 10 or so pages for each role in a sector- you'll find out what I mean when you get there), persevere and someone will contact you, hopefully so that you have been invited for an interview. Good luck!