I would have thought its more agreeing delivery dates for the two being pushed to the right as the last five were ordered for the RN in 2022, the Norwegian ones being an additional order.
I wonder how Simon Lister's “We’re aiming to build the fourth Type 26 in 66 months. From ship one to ship four we aim to improve the performance of the yard by 30 percent.” , and "The ambition in all of this is to build a warship every year—and to build them well." are progressing?
UKDJ reported last June that, at the same press briefing, Lister confirmed that if Norway selects the Type 26, it would “interleave” with UK builds from Ship 4 onwards. “Because the ships are so similar—or frankly, identical—this brings with it the possibility of taking the efficiency up and the cost down.”