I have now used the reopened Wìllesden Library. Essentially, you can bring items back, and borrow them, but there are no periodicals, PCs or WiFi. Similarly there appear to be no events, no museum and no archive service. This seems in line with a generally minimalist line across the UK
When I was there, there were very few users either.
Hopefully, this skeleton service will develop, and I was told that pre-booked computers might start from next week.