For 2020, the number of screens for diabetic retinopathy purchased, the number of screens delivered, and the DNA rate./How many diabetic retinopathy screening episodes were delivered during lockdown, and how long any disruption lasted (i.e when did screening return to ‘normal’)./On January 1 2021, how many new referrals were on the wait list for their first screening visit, the average time spent on this wait list, and the longest individual time spent waiting./On January 1 2021, how many existing patients were overdue for their follow up screening appointment, the average overdue time, and the longest individual time overdue.