The BBC showed 11 regional episodes of a programme called the Books that Made Britain. One of the episodes was entitled 'Factories to Middle Earth(sic)' and Tolkien was mentioned from 22:50 onwards.

Always nice to see Sarehole Mill on the TV, and you can watch it here (UK only), ... factories-to-middle-earth

Though does not look to have been researched very well, seriously wrong on the number of The Lord of the Rings that have been sold.

I have not watched all 11 of these, but I did like the North West of England episode, which features Arthur Ransome, a writer that Tolkien and his children, liked very much. ... ritain-north-west-england