Hornby R3979 LNER Class W1 Hush Hush 1935 Double Blast Pipe 10000Hornby R3979 LNER Class W1 Hush Hush 1935 Double Blast Pipe 10000 The first reference to 10000's designation as Class W1 was on 9 November 1926, but where the widely adopted name of 'Hush Hush' came from is disputed. It could be that the nickname arose in the late summer of 1928, as news of Gresley's new locomotive began to leak out, however other sources suggest this was possibly an internal Darlington name that came from the distinctively quiet