Build a small, repeatable evidence register rather than a large list of supposedly AI-ready companies. Recommended fields are:
- Employer and UK location.
- Business segment and verified scale, where available.
- Role, responsibilities and stated reason for recruitment.
- Original advert, source type and requisition identifier.
- Publication, closing, first-seen and last-checked dates.
- Basic salary, hours, employment type and separately stated incentives.
- Software mentioned, without assuming deployment or integration access.
- Proposed workflow hypothesis and alternative explanation.
- Confirmation from the business, if obtained.
Prioritise follow-up where a named contractor has a recent operational vacancy, clearly repetitive work, an accountable manager and willingness to share aggregate process measures. Do not infer spending authority or consent to supplier introductions from a job advert.
Bottom line: the strongest use of hiring signals is to ask a better question before the next hire or software contract: Which work genuinely needs another person, which can be simplified, and which can be automated without losing control? This evidence supports targeted investigation—not a claim that UK HVAC firms are abandoning staff or have a standard AI budget.