Process measures
CRF
CRF
Of 1351 participants with baseline measurements, 65 (4.8%) set a quit date. The median length of time between randomisation and quit date was 6 days (interquartile range = 2–8). Twenty-two (33.8%) of those setting a quit date used NRT or e-cigarettes. The mean number of behavioural support visits was 2.43 (SD = 1.73) out of a total possible of 5 visits. The majority of participants were recorded within the CRF as receiving VBA across all trial arms (98.7–99.8%), and the CO (99%) and LA components (98%) in the intervention arms.Thirty-three baseline visits were recorded capturing intervention delivery. Recordings also indicated that the LA and CO components were delivered with high fidelity, whereas fidelity to the VBA protocol was higher in the VBA-only arm (supplementary file 