Zilch Records was a DIY label. It seems to have issued just the one single, a version of the traditional tune 'Portsmouth', played by the Band Of Yorkshire Imperial Metals (ZILCH-1). Mike Oldfield's version had been a hit in 1976, but the BOYIM rendering failed to emulate that success. There was another, Zilch label, in the 1980s, it was more productive then this one. The logo of the 1980s Zilch label is different to the one on the single, so presumably they were different companies. Distributed By Zilch Records. Thanks to Robert Lyons For The Info.
Yorkshire Imperials Metals