The Gillette Fusion value pack with razor (including 1 blade) and 4 additional blades is down from £10 to £7 at ASDA.
Not sure if Nationwide - but there was a shelf edge label rather than a reduced label.
These were in two places in my local store (Longwell Green, Bristol). In the toiletaries aisle they were priced at £7. In the seasonal aisle at front of store they were still priced at £10. BUT, definitely scanned at £7.00.
Took a quick picture on the mobile.