People & practice
About ValleyCore Toolkit
ValleyCore Toolkit is the registered practice behind advertising spend attribution reporting for UK brands and agencies — established in London in 2017.
Registered name & founding
ValleyCore Toolkit Ltd is the official registered business name. The practice was established in 2017 in London after two former agency analytics leads grew tired of handing clients three conflicting channel winners from three export files.
Early work focused on retail media and search reconciliation for mid-market brands. Over the following years the brief widened to full advertising spend attribution reporting — still delivered as human-led studies and live briefings.
Mission
Help media and finance teams agree on which pounds of advertising spend earned their keep in a named period, with visuals and language a board pack can carry.
How we work
We sit with your exports, ask uncomfortable tagging questions early, document assumptions in the open, and present findings in person or on a call. Every engagement has a named analyst and a named reviewer.
Values we keep visible
- One story per period — we refuse to leave you with parallel “truths.”
- Assumptions on the page — model choices are written, not whispered.
- GB-first scheduling — briefings land in UK working hours unless you ask otherwise.
Where we sit
Our office is at Office 10, 53 Demo Avenue, London ZZ1 1AJ. Most studies run remotely across Great Britain; London readouts are available when the room helps the conversation.