Empirical antibiotic regimens for hospital-acquired pneumonia (HAP) in adults according to current UK guidelines:
The provided UK guideline excerpts do not include specific antibiotic regimens for the empirical treatment of hospital-acquired pneumonia in adults. The NICE guideline referenced for HAP antimicrobial prescribing is mentioned but the detailed recommendations or regimens are not included in the excerpts provided NICE CG191.
Therefore, based on the available context, no explicit antibiotic regimens for HAP can be stated. The user is advised to consult the full NICE guideline on pneumonia (hospital-acquired): antimicrobial prescribing for detailed and current empirical treatment recommendations.