There is a mention of a "Thomas Jefferys" and various historical surveys in archival databases, but no specific "Thomas Flinter" guide from 1978 is widely indexed in academic or public libraries like Internet Archive . Safety Guide for Downloads
You can often find this rare album on streaming platforms or collector sites like Discogs, where you can purchase physical copies or find digital listings.
Be wary of archives that require you to download a separate "installer" or "guide.exe" to extract the files.
Blocked Drains Barnet