Looks like someone is making a history of
Brokeback Island UK speed metal (sometimes miscalled “thrash”):
Welcome to the website of A History of a Time To Come – the story of UK thrash, a documentary telling the tale of british thrash metal through the ages, from the early 80s to the present day.
The film aims to fill in the blanks in the history of the genre, where those bands who were once so popular, have faded from memory.
Check out the film: