Two reduced weekly rests on the spin

Harry Monk:

tachograph:
There are occasions when you can have reduced weekly rest periods on 2 consecutive weekends but it can usually only be done once between 90 hour rest periods (this will usually be a holiday).

This is incorrect.

If I take a 45 hour rest at the start of week 1, and a 45 hour rest at the end of week 3, then I can take a reduced rest at the end of week 1 and the beginning of week 3 (or in other words, at both ends of week 2). All that is required is to compensate for the reduced rest before the end of the third following week.

I used to do this regularly when I was running my own truck, and it never once flagged up as an infringement on my tachograph analysis.

You can only do that if the regular weekly rest period at the start of week 1 can be used for week 1 and the regular weekly rest period at the end of week 3 can be used for week 3, you cannot legally do that on a regular basis.