363 libraries plus 26 mobiles currently under threat or recently closed (List below “News”)
Being the list below represents around a third of  authorities in the UK, the final figure could be from 800 to 1000.

Changes to the total

– plus 9 (out of 77) – Northern Ireland

News
Northern Ireland becomes the last part of the United Kingdom, from the very north of Scotland to Cornwall to South Wales, to announce library closures.  There have been several authorities trying to avoid closing libraries by proposing transferring them to trusts.  While this is certainly better than closing them, the experience of trusts has not been an altogether happy one for library users.  Alan Gibbons, spurred on by the historic nature of the cuts is trying to organise a national campaign to save them. 
 
Angus – Alan Gibbons and Kate Mosse give support to Edzell Library – The Courier
Doncaster – Council not talking to CILIP despite claims – Save Doncaster Libraries
Greenwich – libraries to transfer to a trust? – News Shopper
Moray – libraries to transfer to trust? – BBC
North Yorkshire – Momentum gained in libraries campaign – Scarborough Evening News
Northamptonshire – save Irchester Library campaign – Evening Telegraph
Northern Ireland – Concerns at Richhill as nine libraries under threat – Portadown Times
Richmond – Cuts still going ahead despite better than expected funding – Richmond and Twickenham Times
Somerset – Friends of Glastonbury Library try to save it– Facebook
Somerset – New campaign group formed and release a video – Save Somerset Libraries
Somerset – Wiveliscombe fears – This is the West Country
Walthamstow – UNISON fears survey will be biased towards closing libraries – This is Local London
Worcestershire – Smaller libraries may be under threat – Worcester Standard

Leading authors warn about library closures – Telegraph
Library closures are cultural crudity – Penny for my thoughts
Museums Association concerned about Arts Council taking over from the MLA – Museums Association
National read-in to save our libraries? – Alan Gibbons
Private schools company says buying your own books are better than using libraries – SFS Group
(USA) How to save your local library – Good Culture
(USA) Libraries deliver lifesaving information – Democrat and Chronicle