Table 5.

Predicted coverage rate

Scenarios				Predicted coverage rate
Mode of delivery	Appointment time	Proximity from one’s home	SMS invitation sender
Local vaccination centre	Monday to Friday, 9 am-5 pm	Less than 15 min	NHS	79%
Local vaccination centre	Monday to Friday, 9 am-5 pm	Between 15 and 30 min	NHS	81%

The predicted coverage rates for two ‘realistic’ scenarios – 79% for the first scenario, and 81% for the second scenario – were similar to recent uptake statistics, thereby providing evidence for the external validity of this study