In this pilot study, low-cost air pollution sensor nodes were fitted in waste removal trucks, hospital vans and taxis to record drivers' exposure to air pollution in Central London. Particulate matter (PM_2.5 and PM₁₀), CO₂, NO₂, temperature and humidity were recorded in real-time with nodes containing low-cost sensors, an electrochemical gas sensor for NO₂, an optical particle counter for PM_2.5 and PM₁₀ and a non-dispersive infrared (NDIR) sensor for CO₂, temperature and relative humidity. An intervention using a pollution filter to trap PM and NO₂ was also evaluated. The measurements were compared with urban background and roadside monitoring stations at Honor Oak Park and Marylebone Road, respectively. The vehicle records show PM and NO₂ concentrations similar to Marylebone Road and a higher NO₂-to-PM ratio than at Honor Oak Park. Drivers are exposed to elevated pollution levels relative to Honor Oak Park: 1.72 μg m^-3, 1.92 μg m^-3 and 58.38 ppb for PM_2.5, PM₁₀, and NO₂, respectively. The CO₂ levels ranged from 410 to over 4000 ppm. There is a significant difference in average concentrations of PM_2.5 and PM₁₀ between the vehicle types and a non-significant difference in the average concentrations measured with and without the pollution filter within the sectors. In conclusion, drivers face elevated air pollution exposure as part of their jobs.