Take a look at the tandem trike records of Arnold and Grimes set in 1954. They are still unbeatable as they were such a fine pair of athletes.
It’s
Crimes not Grimes and they are more commonly referred to in End to End circles and the Trike world as Crimes and Arnold (not Arnold and Crimes) in that order as that is how they rode – steerer and stoker.
They were, at the time and for the next four years, the fastest on ANY machine to do the End to End despite having spent 6 hours off the longbarrow tending to knee and stomach troubles.
Dave Keeler bettered their time in 1958 - but he was on a bike.
It was 12 years before a tandem bike bettered their time (Swinden and Withers in 1966).
Several attempts have been made on it - Kenny and Taylor got within 70 miles - but it remains unbroken.