I have a number of non-standard rolls with the following features:

Probably English; Each roll contains a number of popular/dance
tunes; 88-note with standard spacing plus bass and theme snakebite
perforations.

Both the left and to the right of the snakebites are four additional
perforation tracks (8 in total);  some of these are probably lock
and cancel.

Can anyone help identify where these rolls may have been used?

Happy New Year To All

Phil Dayson