Market Research : Tech Recruiters London

I need someone to identify the contact details for 150 tech recruiters in London, UK in to a Google Sheet immediately

I do not expect them all to be done over night, but I need at least the first 50 doing so that I can start working from the document tomorrow morning.

I do not expect the person taking this job to necessarily work in recruitment, but I do need them to understand what a tech recruiter is.