Yes this is correct and has been brought up and discussed several times since the changes were announced.
The UuA price is the difference between an award in the two cabins, and due to the Peak/Off Peak tables this means Off Peak UuA is more.
See also:
http://www.flyertalk.com/forum/briti...-28-april.html
http://www.flyertalk.com/forum/briti...os-2015-a.html
http://www.flyertalk.com/forum/briti...b-changes.html