Regions and their authorities
East: Bedford, Cambridgeshire, Central Bedfordshire, Lincolnshire, Norfolk, Peterborough, Suffolk, Southend-on-Sea
East Midlands: Derby City, Derbyshire, Leicester City, Leicestershire, Nottingham City, Nottinghamshire, Rutland, North Northamptonshire
London: Barking & Dagenham, Barnet, Bexley, Brent, Bromley, Camden, City of London, Croydon, Ealing, Enfield, Greenwich, Hackney, Hammersmith and Fulham, Haringey, Harrow, Havering, Hillingdon, Hounslow, Islington, Lewisham, The Royal Borough of Kensington and Chelsea (RBKC), Lambeth, Merton, Newham, Royal Borough of Kingston upon Thames, Redbridge, Richmond-upon-Thames, Southwark, Sutton, The Royal Borough of Kensington and Chelsea (RBKC), Tower Hamlets, Waltham Forest, Wandsworth, Westminster
North East: Darlington, Durham, Gateshead, Hartlepool, Middlesbrough, Newcastle, Northumberland, North Tyneside, South Tyneside, Redcar & Cleveland, Sunderland, Stockton-on-Tees
North West & Merseyside: Blackburn-with-Darwen, Blackpool, Bolton, Bury, Cheshire West & East & Chester, Cumberland, Halton, Knowsley, Lancashire, Liverpool, Manchester, Oldham, Rochdale, Salford, Sefton, St Helens, Stockport, Tameside, Trafford, Warrington, Westmoreland and Furness, Wigan, Wirral
South East: Bracknell Forest, Brighton and Hove, Buckinghamshire, East Sussex, Essex, Hertfordshire, Kent, Luton, Medway, Milton Keynes, Oxfordshire, Portsmouth, Reading, Slough, Southampton, Surrey,Thurrock, West Berkshire, West Northamptonshire, West Sussex, Windsor and Maidenhead, Workingham
South West: Bath & North East Somerset, Bournemouth & Christchurch & Poole, Bristol, Cornwall, Devon, Dorset, Gloucestershire, Hampshire, Hertfordshire, Isle of Wight, North Somerset, Plymouth, Somerset, South Gloucestershire, Swindon, Torbay, Wiltshire, Worcestershire
West Midlands: Birmingham, Coventry, Dudley, Sandwell, Shropshire, Solihull, Staffordshire, Stoke-on-Trent, Telford & Wrekin, Walsall, Warwickshire, Wolverhampton
Yorkshire & The Humber: Barnsley, Bradford, Calderdale, City of York, Doncaster, East Riding of Yorkshire, Kingston Upon Hull, Kirklees, Leeds, North East Lincolnshire, North Lincolnshire, North Yorkshire, Rotherham, Sheffield, Wakefield
Northern Ireland: The Northern Ireland Library Authority
Scotland: Aberdeen, Aberdeenshire, Angus, Argyll & Bute Clackmannanshire, Dumfries and Galloway, Dundee, East Ayrshire, East Dunbartonshire, East Lothian, East Renfrewshire, Edinburgh, Eilean Star, Falkirk, Fife, Glasgow, Highland, Inverclyde, Midlothianshire, Moray, North Ayrshire, North Lanarkshire, Orkney, Perth and Kinross, Renfrewshire, Scottish Borders, Shetland, South Ayrshire, South Lanarkshire, Stirling, West Dunbartonshire, West Lothian
Wales: Blaenau Gwent, Bridgend, Caerphilly, Cardiff, Carmarthenshire, Ceredigion, Conwy, Denbighshire, Flintshire, Gwynedd, Isle of Anglesey, Merthyr Tydfil, Monmouthshire, Neath Port Talbot, Newport, Pembrokeshire, Powys, Rhondda Cynon Taff, Swansea, Torfaen, Vale of Glamorgan, Wrexham