Not every force offers the speed awareness course, and if they do it is only for a couple of MPH over the enforcement limit generally, e.g. 35/36mph in a 30mph for instance. Varies from force to force though.
You could receive a ticket through the post, or you might've been let off. If you do receive a ticket, the NoIP/NIP must be served within a 14 day period of the offence, which is subtly different to being posted/received.