| No. 1 | Farndale Road | The Council of the County Borough of Teesside |
| Mill House | The County Council of Cumberland |
| Penshaw House | The County Council of Durham |
| Seaham | The Council of the County Borough of Sunderland |
| No. 2 | Ashbank | The Council of the County Borough of York |
| The Moss | The Council of the County Borough of Sheffield |
| Shirecliffe House | The Council of the County Borough of Sheffield |
| Spring Cottage | The Council of the County Borough of Kingston-upon-Hull |
| Tong Park House | The County Council of Yorkshire, West Riding |
| Westwood Grange | The Council of the County Borough of Leeds |
| Whinmoor | The Council of the County Borough of Leeds |
| Woodside | The Council of the County Borough of Kingston-upon-Hull |
| No. 3 | Burford | The Council of the County Borough of Manchester |
| Derwent House | The Council of the County Borough of Liverpool |
| High Bank | The County Council of Cheshire |
| Ravenscroft | The County Council of Lancashire |
| Red Sands | The County Council of Cheshire |
| Rose Hill | The Council of the County Borough of Manchester |
| Slynedales | The County Council of Lancashire |
| Wood End | The County Council of Lancashire |
| Woolton Vale | The Council of the County Borough of Liverpool |
| No. 4 | Field House | The Council of the County Borough of Birmingham |
| Forhill House | The Council of the County Borough of Birmingham |
| Saltwells | The Council of the County Borough of Dudley |
| Welland | The County Council of Worcestershire |
| The Wissage | The County Council of Staffordshire |
| No. 5 | Ashley House | The County Council of Nottinghamshire |
| Beechwood | The Council of the County Borough of Nottingham |
| The Cedars | A Joint Committee of the County Council of Derbyshire and the Council of the County Borough of Derby |
| Enderleigh | The Council of the County Borough of Nottingham |
| Saxon House | The County Council of Lincolnshire, Parts of Lindsey |
| Watkin Lodge | The Council of the County Borough of Grimsby |
| Woodlands | The Council of the County Borough of Leicester |
| No. 6 | Boyles Court | The County Council of Essex |
| Bramerton Lodge | The County Council of Norfolk |
| Newport House | The County Council of Essex |
| No. 7 | Heyford Hill House | The County Council of Oxfordshire |
| Oxenden House | The County Council of Bedfordshire |
| Thornbury House | The County Council of Oxfordshire |
| No. 8 | Cumberlow Lodge | The Council of the London Borough of Lambeth |
| Little Health Lodge | The Council of the London Borough of Newham |
| Middlesex Lodge | The Council of the London Borough of Hillingdon |
| Milton House | The Council of the London Borough of Croydon |
| St. Nicholas House | The Council of the London Borough of Enfield |
| Stamford House | The Council of the London Borough of Hammersmith |
| No. 9 | Beechfield | The County Council of West Sussex |
| Green Acre | The County Council of Kent |
| Harrietsham | The County Council of Kent |
| Pentlands | The County Council of Surrey |
| Stonepound House | The County Council of East Sussex |
| No. 10 | Ashbourne Lodge | The County Council of Hampshire |
| Glen House | The Council of the County Borough of Portsmouth |
| Red Hatch | The County Council of Hampshire |
| No. 11 | Brooklands | The County Council of Somerset |
| Fullaford House | The County Council of Devon |
| Horfield Lodge | The Council of the County Borough of Bristol |
| Parklands | The Council of the County Borough of Plymouth |
| No. 12 | Crick House | A Joint Committee of the County Council of Glamorgan, the County Council of Monmouthshire and the Council of the County Borough of Newport |
| Rheanfa | The Council of the County Borough of Swansea |
| The Rise | The Council of the County Borough of Cardiff |
| Sully | The County Council of Glamorgan |