This was a "Bertrand" (hence the name), with cantilever brakes,
3-speed Trivelox gears and splined hub (which meant the
sprockets moved, not the rear derailleur). This meant
the chain stayed in
line regardless of the gear.
Here's a picture of the Trivelox gear.
In these pictures, taken at Levens Bridge near Kendal, Les had
just finished repairing another couples tandem. It was this couple (who were on
holiday in the Lakes at the time) who took the pictures and sent them to him.
One historic ride they undertook on the tandem was
the morning they set off from Ulverston headed for Ullswater.
After going over Kirkstone Pass, they stopped for a
brew at Brothers Water, and then
decided on a change of plan and headed for Gretna Green. They went along Ullswater,
through Penrith, to Carlisle and arrived at Gretna Green at around 4pm.
On the return they had 'high tea' at Penrith at around 9pm, back over Kirkstone Pass, and
down through Bowness onto the East side of Windermere where they brewed up on the roadside
at the "Hill of Oaks" from where they could hear the clock in Bowness striking
always carried their primus stove with them and usually had bacon and
eggs in the saddlebag.