Thanks for sharing this news, Rasberry. As they have mentioned that 1,000 books in Bengali will be released, that means it may be new set of book. Because they released so many books here of their Endanger archive project already. http://eap.bl.uk/database/collections.a4d
We are already using at our Bengali wikisource (https://bn.wikisource.org/) project for proofreading.
Partnership with School of Cultural Texts and Records (SCTR) of Jadavpur University can be access here http://bichitra.jdvu.ac.in/index.php
But the National Library of India haven't released their digital collection till now. http://www.nationallibrary.gov.in/
Regards, Jayanta