Oxfordshire is now doing a trial with Voi. 50 scooters based in Headington to start with - £1 fee plus 20p per minute. 10mph speed limit and only available 6am to 10pm.
https://news.oxfordshire.gov.uk/new-escooter-launch/
This sounds interesting:
offering incentives and encouraging riders to take Voi’s accredited e-scooter digital traffic school, which has trained over half a million users.
I just had a go. First question:
Why is it important to always wear a helmet?
a) It prevents your skull from fracturing
b) All of the mentioned
c) It prevents and reduces injuries
d) It can save your life in the case of an accident
It rejected my answer "It prevents and reduces injuries".
...turns out it wants "All of the mentioned"

Anyway, it seems to be a mixture of the sort of questions we all know from the driving theory test, combined with questions on how the scooters work, where they should be parked, whether you're colourblind, and so on.
Some problematic answers pertaining to parking the scooters on the pavement rather than the road, and riding in the gutter, but it's mostly sensible. And I now have £5 of scooter credit to play with.