Almost everything in the sale is Advance. Only one TOC, so far as I know, has Off-Peak fares in the sale. Anytime fares were never planned to be included.
So absolutely no chance of a go-anywhere ticket then for a low maximum fare, like the German promotion.
I suppose the Welsh/Scottish versions (if they come) might be more flexible.
Discounted Rover/Ranger tickets would have been nice.
The Ts&Cs shown on the Avanti site (ATOC and Avanti) says Avanti's are Avanti-only, so no interoperability.
Quota-controlled, overall ticket limit (75,000 on Avanti), must be bought at least 1 day ahead.
Off-peak tickets will be offered on TOCs where Advances are not available.
On-line only, so Merseyrail won't be included!
The offer is for DfT TOCs only (ie excludes TfW and Scotrail - presumably they will have their own offer).
What a feeble offer.