Short, but sweet.
Great news today in regards to rail (United Kingdom). I have been in contact with Network Rail and have received permission to use the information within the Sectional Appendix or NESA to share rail data including speed limits, references, codes and restrictions. The only condition was that it needs to be attributed to 'Network Rail'.
I have various FOI requests currently in progress like TIPLOC latitude and longitudes which is useful for stations but also junction locations. Hopefully, signal locations too (most likely a no to that one due to potential theft and damage).