... . In platform 1 the engine release turnout at the buffer stops has an REA semi-curved flexible switch with undercut-pattern switch blades (no joggle). In platform 2 the engine release turnout has a GWR curved flexible switch with straightcut-pattern blades and joggled stock rails. The very much more robust nature of the blade tips in the latter case is very evident. posted: 16 Feb 2018 09:06 from: Tony W Hi Martin. My query arises from this section of British Railway Track as always. 2151_160347_490000000.jpg Second Paragraph page 79 of the 1956 edition. The previous paragraph states that this applies to both Bull Head and Flat Bottom rails. The 1964 edition states the same at the bottom of page 88. This would imply without exception. However railways being what they are, I am quite prepared to believe that there were variations among railway company practices. Indeed I would be surprised if there weren't. Fully agree with you over the confusion arising between the various types and descriptions of switch blade and this is something I intend to ...