Make sure you don't do it again within 3 years as no option for course. within 3 years of doing a course.
Not quite so...unless something has changed.
I know two people who have been caught in different counties, (Dorset and Wiltshire) and have been offered speed awareness courses by both counties. In one case there was less than 3 months between courses.
Also, when I did my last bike safe course I was told by Wiltshire Police (in 2013) that if you are offered a speed awareness course and you both accept and attend then all records of the matter are deleted. No record is retained. Only if you fail to attend is a formal penalty notice sent out and put on record.