From the link Ron put up yesterday then the two higher paying sessions were real.
The lower paying are test.
I do think however that whilst they are test, they are still making a real impact, its just they are not desperate requirement as opposed to nice to have.
Also I think the point of the test sessions is likely to be different this year to last. I think last was mainly, do they work, can they make a difference.
This year seems shorter notice to some extent and I wonder if its more focussed on notice and timings.
Plus of course this year moved the in day out of scope and brought export into scope. (Export being really dumb to be excluded last year of course).
I believe as part of the scheme NG guarantee at least 12. Obviously there is work for the energy companies and to get public engagement there needs to be enough to actually garner some momentum.