As suggested by Anne, this registration is confirmed in TNA records at Kew as 826847 dated 11th March 1938 - and some additional images now attached.
These pix are taken from the Representations (that part of the records that deals with images only). Regrettably, there is no available data that can be supplied from the Register (that part of the record that provides text information) - it seem that either The Board of Trade, or (during the course of transfer The National Archives themselves) have mislaid one entire Register which covers this part of 1938 (Rd. Nos. 824445 - 929999).