List building

Brief: London executive search contacts list
Goal
Build a list of London-based executive search professionals I can email. For each person, include whether they are B2B or B2C and their industry focus.
Who to include
People working in executive search / retained search / leadership advisory (e.g., Partner, Principal, Director, Founder) who are based in London.
Include:
London-based
Does executive/retained search (board, C-suite, VP+), not junior recruitment.
Recruiting for Titles: Chief Product Officer, VP Product, VP technology, VP digital
Industry specialism: B2B SaaS, enterprise technology, and platform businesses, media
B2B or B2C
PE-backed or venture-backed
Perm & Fractions
Exclude:
junior recruiters and anyone whose London base or exec-level focus cannot be verified.
Public traded companies
Industry: fintech, pharma, third sector, D2C
Fractional
What to deliver
A spreadsheet (one row per person) with these columns:
Full name
Title
Search Firm
Industry focus (primary)
Industry focus (secondary, optional)
B2B / B2C / Mixed
PE Focus / VC Focus / Publicly traded focus
LinkedIn URL
Firm bio / team page URL (if available)
Work email
Email source
Notes (optional)

Email requirements (deliverability)
Work emails must be deliverable: provide a direct, individual work email for each person (no generic inboxes like info@, hello@, careers@).
Accepted sources only (must record in the “Email source” column):
Explicitly published for that person on the firm’s team/bio page, official PDF, press release, or reputable event/speaker page.
Pattern verified only if the exact firm email format is proven with 3 or more explicitly published individual emails on the same domain, and the person’s email can be derived unambiguously from that pattern. If multiple patterns exist, do not infer.
Third-party publication only if reputable and clearly ties the email to the person and firm (avoid directories/scraped sites).
Hard exclusions: no guessed emails without pattern proof, no scraped lead databases, no personal emails (gmail/outlook etc), no mismatched domains, no outdated emails if the person has moved firms.
Evidence and transparency: include a supporting URL for the source (and for pattern-verified emails, include the pattern plus URLs showing the 3+ examples in Notes).

Target size
Provide 60 to 100 contacts (or fewer if you can only verify details for fewer).

UPDATE:

The contacts must be ONLY from these companies:

Key Search
True Search
Kepler Search
Erevena
Wilton & Bain
Marlin Hawke
Korn Ferry
Russell Reynolds Associates
Heidrick & Struggles
Spencer Stuart
Odgers
Etonbridge Partners
Riviera Partners
Albany Partners
The Up Group
Talent Equity
Drax Affinity
Greco Advisors
Albany Partners