Staff have just provided me with some LMS numbers. We're closing in on the 4M items and 1M borrowers figures. As of today the figures are 3,953,158 items and 971,090 customers.
Of course the customer numbers will reduce as we de-duplicate the customer database. However anecdotal evidence suggests that many libraries have seen an increase in borrowers - either former borrowers re-registering and returning to use their library or new users.