Where do the opportunities come from?
The UK government's Find a Tender service, which is where public sector contract notices above the relevant thresholds must be published. Gaffer reads its official API rather than scraping a third-party listing site.
Is public sector work realistic for a small trade business?
More than most assume — councils, housing associations, schools and NHS trusts all procure routine trade work, often in lots sized for regional contractors. The barrier is usually the paperwork, which is what the tender writer and accreditation tools address.
Does bookmarking do anything beyond saving it?
It builds your shortlist, and from a bookmarked opportunity you can start a bid, which creates the tender record with the client, deadline and value already populated.
Will I see every opportunity?
You see notices from the Find a Tender feed matched to your trades. Lower-value contracts are sometimes advertised only on Contracts Finder or a buyer's own portal, so it is a strong source rather than a complete one.