After my successful interview the email I got said I'd be placed in a talent pool for up to 12 months and I'd be placed on a course in 2022.
As it happens I got a phone call about a month later (back in September) saying somebody had dropped out for a course in a few weeks time for a different location, but as I was in the hour commute range would I be interested in this depot instead of the one I'd applied for originally. Of course I bit their hand off at the chance, but I did have the option to stay in the pool for my original depot and was told I'd probably not be starting until late 2022 if i waited.
Depending on location, you could well be waiting until 2023 for a course, however they're in need of staff and it's a big recruitment drive. Courses have been planned well into next year now and for some locations the talent pool is apparently for up to 2 years instead of the usual 1. I know some people who only waited a few weeks in the pool and had a course offer, while others had been waiting over a year.
Well done for making it this far!