Footage from the ITV Border archives shows the day Westmorland Council finally finished, and the subsequent opening of Cumbria County Council in 1974.
The film was part of a series looking back at the history of Border TV.
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Today is the 40th birthday for Cumbria and we have been asking you what county you identify with - Cumbria, Lancaster, Westmorland or Yorkshire?
@SarahMcRanty on Twitter
@stupotackers on Twitter
I'm 100% Cumbrian my dad is from Westmorland and my mum is from Cumberland.
@Brian_Steadman on Twitter
Difficult to answer living in Sedbergh! Cumbria, in Yorkshire Dales, Lancashire Postcode, South Lakes Council #whowantsus
Sean Duffy on Facebook - It was known as Cumberland before the changes. It was also a better place to live. The boundary changes killed local communities and left Whitehaven with no local voice.
The county of Cumbria is celebrating its 40th birthday today.
In 1974 Cumberland and Westmorland, and parts of Lancashire and Yorkshire, merged to form the new county.