I stress that this is not a news story sourced from insiders but has been put in my head by one of the visitors to the blog who searched for the word string "Cosworth, for sale, McLaren, F1". If that doesn't give you ideas then nothing will.
We know that McLaren have been tinkering with the idea of producing their own engines for the road car and for F1. So far, the word coming from the MTC is that they have not done it/are not planning on doing it in the immediate future.
The sale of Cosworth must be enticing for them though. Here is a ready-made engine producing factory, with expert staff who have the experience and knowledge of how to build Formula 1 engines. Add this to McLaren's own expertise and Ron's single-mindedness when it comes to success in any given field and you've got the perfect combination - a world class, British Formula 1 team and Marque and a British engine designing and producing factory.
It seems like a match made in heaven.
The only thing that could make it better is if Williams were to enter a joint venture with McLaren to purchase the Cosworth factory and produce the engines.