Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Number & Name | Description | Livery | Owner(s) | Date |
| --- | --- | --- | --- | --- |
| No. 1012 | Mark 1 RSO | N/A. | Private Owner. | 1951.0 |
| No. 975046 | Mark 1 BSK | Departmental. | Great Central Railway (Nottingham) Ltd. | 1951.0 |
| No. ADE321047 | Mark 1 Unclassed RFO | N/A. (Graffitied) | BR Standard Coach Group. | 1951.0 |
| No. W15207 | Mark 1 CK | BR Lined Maroon . | BR Standard Coach Group. | 1953.0 |
| No. W15208 | Mark 1 CK | BR Lined Maroon . | BR Standard Coach Group. | 1953.0 |
| No. W24421 | Mark 1 SK | BR Chocolate and Cream . | BR Standard Coach Group. | 1953.0 |
| No. 3013 | Mark 1 FO | BR Blue and Grey . | Private owner. | 1954.0 |
| No. 3042 | Mark 1 FO | Pullman Style Umber & Cream . | Great Central Railway Plc. | 1954.0 |
| No. E21031 | Mark 1 BCK | BR Lined Maroon . | Private owner. | 1954.0 |
| No. 24778 | Mark 1 SK | BR Chocolate and Cream . | Private Owner. | 1954.0 |
| No. E34393 | Mark 1 BSK | BR Blood and Custard . | Private owner. | 1954.0 |
| No. E43043 | Suburban Mark 1 CL | N/A. | Private owner. | 1954.0 |
| No. 3172TL | Mark 1 BCK | Irish Rail Orange & Black . | Great Central Railway Plc. | 1955.0 |
| No. 3178TLA | Mark 1 BSK | Irish Rail Orange & Black . | Great Central Railway Plc. | 1955.0 |
| No. E34738 | Mark 1 BSK | BR Blue and Grey . | Great Central Railway Plc. | 1955.0 |
| No. E3079 | Mark 1 FO | BR Blood and Custard . | Great Central Railway Plc. | 1956.0 |
| No. SC4207 | Mark 1 TSO | N/A. | Great Central Railway (Nottingham) Ltd. | 1956.0 |
| No. E4630 | Mark 1 TSO | BR Blood and Custard . | Great Central Railway Plc. | 1956.0 |
| No. E9316 | Mark 1 BSO | BR Lined Maroon . | Great Central Railway Plc. | 1956.0 |
| No. E15960 | Mark 1 CK | BR Blood and Custard . | Private Owner. | 1956.0 |
| No. 34990 | Mark 1 BSK | Departmental Yellow & Black. | Private Owner. | 1956.0 |
| No. W80438 | Mark 1 POS | Royal Mail (1960s) . | Railway Vehicle Preservations Ltd. Private owner. | 1956.0 |
| No. ADB975638 | Mark 1 BSK | N/A. | Private Owner. | 1956.0 |
| No. M1811 | Mark 1 RMB | BR Lined Maroon . | Great Central Railway (Nottingham) Ltd. | 1957.0 |
| No. E4662 | Mark 1 TSO | BR Lined Maroon . | Private Owner. | 1957.0 |
| No. 1899 (4758) | Mark 1 TSO | Pullman style Umber & Cream . | Great Central Railway Plc. | 1957.0 |
| No. E4788 | Mark 1 SO | BR Lined Maroon . | Great Central Railway Plc. | 1957.0 |
| No. S25312 | Mark 1 SK | BR Green . | Private owner. | 1957.0 |
| No. E25366 | Mark 1 SK | BR Lined Maroon . | Private owner. | 1957.0 |
| No. 81343 | Mark 1 BG | Pullman style Umber & Cream . | Private owner. | 1957.0 |
| No. S81382 | Mark 1 BG | BR Green . | Private Owner. | 1957.0 |
| No. 94407 NBA | Mark 1 BG | Departmental. | Great Central Railway (Nottingham) Ltd. | 1957.0 |
| No. 21184 | Mark 1 BCK | BR Lined Maroon . | Private owner. | 1958.0 |
| No. 21202 | Mark 1 BCK | N/A. | Private Owner. | 1958.0 |
| No. E86129 | Mark 1 GUV | BR Lined Maroon . | Nottingham (Great Central) DMU Group. | 1958.0 |
| No. 86168 | Mark 1 GUV | Maroon. | Renaissance Railcars. | 1958.0 |
| No. 94606 | Mark 1 CCT | Maroon. | Railway Vehicle Preservations Ltd. | 1958.0 |
| No. 94707 | Mark 1 CCT | Tartan Arrow. | Railway Vehicle Preservations Ltd. | 1958.0 |
| No. 1525 | Mark 1 RKB | Pullman style Umber & Cream . | Great Central Railway Plc. | 1959.0 |
| No. 3092 | Mark 1 FO | Pullman style Umber & Cream . | Private owner. | 1959.0 |
| No. S4830 | Mark 1 TSO | BR Green . | Great Central Railway Plc. | 1959.0 |
| No. E4857 | Mark 1 TSO | BR Blood and Custard . | Private owner. | 1959.0 |
| No. E16070 | Mark 1 CK | BR Lined Maroon . | Private owner. | 1959.0 |
| No. W80301 | Mark 1 POS | Royal Mail (1960s) . | Railway Vehicle Preservations Ltd. | 1959.0 |
| No. 80307 | Mark 1 POS | Royal Mail . | Private owner. | 1959.0 |
| No. 80401 | Mark 1 POT | Royal Mail (1960s) . | Private owner. | 1959.0 |
| No. 86709 | Mark 1 GUV | Maroon. | Private owner. | 1959.0 |
| No. 86830 | Mark 1 GUV | Maroon. | Private owner. | 1959.0 |
| No. E93565 | Mark 1 GUV | BR Rail Blue . | Great Central Railway (Nottingham) Ltd. | 1959.0 |
| No. E93579 | Mark 1 GUV | Maroon. | Railway Vehicle Preservations Ltd. | 1959.0 |
| No. E94286 | Mark 1 CCT | BR Lined Maroon . | Private owner. | 1959.0 |
| No. 96190 | Mark 1 GUV | Maroon. | Private owner. | 1959.0 |
| No. SC1100 | Mark 1 RE | BR Lined Maroon . | Great Central Railway Plc. | 1960.0 |
| No. E1526 | Mark 1 RKB | BR Blood and Custard . | Great Central Railway Plc. | 1960.0 |
| No. S1852 | Mark 1 RMB | BR Green . | Great Central Railway Plc. | 1960.0 |
| No. W1962 | Mark 1 RU | BR Chocolate and Cream . | Private owner. | 1960.0 |
| No. 94709 | Mark 1 CCT | Maroon. | Private owner. | 1960.0 |
| No. 96194 | Mark 1 GUV | InterCity Executive (Graffitied). | Private owner. | 1960.0 |
| No. E1654 | Mark 1 RBR | BR Blood and Custard . | Great Central Railway (Nottingham) Ltd. | 1961.0 |
| No. E1695 | Mark 1 RBR | BR Lined Maroon . | Great Central Railway Plc. | 1961.0 |
| No. 1898 (25788) | Mark 1 SK | Pullman style Umber & Cream . | Great Central Railway Plc. | 1961.0 |
| No. S4914 | Mark 1 TSO | BR Green . | Great Central Railway Plc. | 1961.0 |
| No. W13313 | Mark 1 FK | BR Chocolate and Cream . | Private owner. | 1961.0 |
| No. M16168 | Mark 1 CK | BR Lined Maroon . | Great Central Railway (Nottingham) Ltd. | 1961.0 |
| No. 16190 | Mark 1 CK | BR Lined Maroon . | Great Central Railway (Nottingham) Ltd. | 1961.0 |
| No. W21242 | Mark 1 BCK | BR Chocolate and Cream . | Great Central Railway Plc. | 1961.0 |
| No. W25711 | Mark 1 SK | BR Chocolate and Cream . | Private owner. | 1961.0 |
| No. E4922 | Mark 1 TSO | BR Lined Maroon . | Private owner. | 1962.0 |
| No. E4948 | Mark 1 TSO | BR Blood and Custard . | Private owner. | 1962.0 |
| No. W4982 | Mark 1 TSO | BR Chocolate and Cream . | Private owner. | 1962.0 |
| No. 14021 | Mark 1 BFK | BR Lined Maroon . | Private owner. | 1962.0 |
| No. E3126 | Mark 1 FO | BR Blood and Custard . | Great Central Railway Plc. | 1963.0 |
| No. E14023 | Mark 1 BFK | BR Lined Maroon . | Great Central Railway (Nottingham) Ltd. | 1963.0 |
| No. S14026 | Mark 1 BFK | BR Green . | Great Central Railway Plc. | 1963.0 |
| No. W80458 | Mark 1 BPOT | Royal Mail (1960s) . | Railway Vehicle Preservations Ltd. Private owner. | 1967.0 |
| No. 80345 | Mark 1 POS | Royal Mail (1960s) . | Private owner. | 1968.0 |
| No. W80349 | Mark 1 POS | Royal Mail (1960s) . | Railway Vehicle Preservations Ltd. | 1968.0 |
Question:
Which owner has a description of Mark 1 pos and is dated 1956?
Answer:
Railway Vehicle Preservations Ltd. Private owner.