Who I am, what I hold about you, why, and your rights. Plain English, no drama.
Luke De Marco, trading as CIS Books — Garden Cottage, Woodmancote, Cirencester, Gloucestershire GL7 7ED. I'm the data controller.
Contact: luke@cisbooks.co.uk or 07375 639493.
Only what's needed, only with: HMRC (your filings), my software providers (Xero, Hubdoc, GoCardless, my identity-verification provider, Formspark — the calculator email form, Cal.com — bookings, and Cloudflare — website hosting), my AML supervisor (HMRC), and my professional indemnity insurer if there's a claim. I never sell your data and I don't share it with anyone else without asking you first.
Cookies and ads measurement. This site uses Google's advertising tag to measure whether our ads work. It runs without cookies: no advertising or analytics cookies are set on this site. We also use Cloudflare Web Analytics, which is cookieless and does not track you across sites.
Some processing uses automated tools, including AI — for example extracting data from receipt photos and drafting your monthly report. Every figure in anything I send you or file for you is checked by me before it goes out. Nothing is filed on automation alone.
You can ask for a copy of your data, ask me to correct it, ask me to delete what I'm not legally required to keep, and object to or restrict processing. Email luke@cisbooks.co.uk — I'll respond within one month.
To delete your data (where the law allows): email the same address with "delete my data" and I'll confirm what can go and what must stay under HMRC/AML retention rules.
Not happy with how I've handled something? Complain to the ICO at ico.org.uk or 0303 123 1113.
Last updated: 18 August 2026.