Although mentioned in the UK pandemic plan, essential service providers were not among the priority groups. They may be important targets of future influenza pandemic vaccination campaigns. Therefore, we conducted a cross-sectional survey among 380 employees from West Midlands police headquarters and 15 operational command units in the West Midlands Area during December 2009–February 2010 to identify factors affecting intention to accept the pandemic influenza A (H1N1) vaccine. One hundred and ninety nine (52.4%) employees completed the questionnaire. 39.7% were willing to accept the vaccine. The most common reasons for intention to accept were worry about catching Swine Flu (n = 42, 53.2%) and about infecting others (n = 40, 50.6%). The most common reason for declination was worry about side effects (n = 45, 57.0%). The most important factor predicting vaccine uptake was previous receipt of seasonal vaccine (OR 7.9 (95% CI 3.4, 18.5)). Employees aged <40 years, males, current smokers, and those who perceived a greater threat and severity of swine flu were also more likely to agree to the vaccine. The findings of this study could be used to improve future pandemic immunization strategies. Targeted education programs should be used to address misconceptions; the single most important factor which might lead to a large improvement in uptake is to allay concern about side effects.