RFNA is a rocket fuel (a storeable oxidiser): red fuming nitric acid. HNO3 + 13% N2O4 and 3% H20. The colour of the resulting red fuming nitric acid is imparted by N204.
... Anglia Railway Museum[?]
Strumpshaw Hall Steam Museum[?]
Toad Hole Museum[?], How Hill
Working Textile Museum[?], Derwent Valley Mills
Northumberland
Grace ...