Data Cleaning & Contact Research - Spreadsheet Data

I have 8 spreadsheets (~65,000 rows total) of UK healthcare providers (home care agencies, care homes, and service providers) sourced from the CQC register. I need someone to clean the data and research contact details for each organisation.
Scope of work:
● Deduplicate rows and standardise phone number / postcode formatting.
● Research and add: key contact name (Director/Registered Manager/Owner), direct phone number, and email address for each provider, using Companies House, the provider's website, and the CQC location page.
● Add incorporation date and filed turnover band from Companies House.
● Mark unverifiable fields clearly as “Not found” rather than guessing.
Ideal candidate:
Experience with UK company research (Companies House), strong attention to detail, comfortable working in Excel/Google Sheets at scale, and able to follow a strict “verify, don't guess” standard for data accuracy.
I have attached a sample of one of the sheets