Double H Records was A custom recording label from the south-west of England. Double H seems to have had a connection with the West Of England Sound studio. The Silhouettes' EP featuring 'Sarah Jane' and three other tracks (WE-008) was numbered in a series which appears to have been used by that company. EP had another number, DH-105, which requires explaining. The only two other Double H records been in that DH-100 series. Both of them were LPs: 'Stay Awhile' by Rikki Avon (DH-103), and Dave Williams's 'Travelling Man' (DH-104; 1978). The latter gives us a likely year of release for the Silhouettes EP. Thanks to Robert Lyons For The Info.