Shuttleworth pads
Shuttleworths appear to have been named after the printing firm which sold them to the Liberal party. They have also been known as Mikardo pads (the election team in Reading for Labour MP Ian Mikardo may have invented their use). Tories called them Reading pads.
The early forms using carbon paper could have been run off by any printer with a pen ruling machine for making ledgers. Printing and gluing ncr forms was a trickier job so parties commissioned big batches centrally.
A pen ruling machine in action:
https://www.youtube.com/watch?v=WmhqqRzzPgM
Biting the hand that feeds IT
