1 Prof. Jones: Right, let's get started. Measure out a grid of five yard squares with this yardstick.
2 Minnesota Jones: I once measured the length of Britain from Land's End to John o' Groats with a yardstick.
3 Minnesota Jones: Laid it end to end the whole way.
3 Monty: Wow. Do you still have the yardstick?
4 Minnesota Jones: I gave it to Queen Victoria and it's now kept in the Tower of London. It is after all the rightful ruler of all Britain.

Not only is there a Wikipedia page on Land's End and one on John o' Groats, there's also one on Land's End to John o' Groats.

By the way... I kind of hope someone at Wikipedia is scratching their head over my recent search history. Having just queued up the past dozen strips in a row, my browser history looks something like this:

• Victor Emmanuel II of Italy
• King of Italy
• Umberto II of Italy
• Urquhart Castle
• Loch Ness
• Royal prerogative in the United Kingdom
• Swan Upping
• Wheeler-Kenyon method
• Plan (archaeology)
• List of English monarchs
• Dagger of the Mind
• Giorgio A. Tsoukalos
• Steam
• Tintagel Castle
• Duchy of Cornwall
• George VI
• Prince of Wales
• Heir apparent
• Heir presumptive
• Primogeniture
• List of heirs to the British throne
• Crown Estate
• Perth Agreement
• Marmite
• Land's End to John o' Groats
• Ruler