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:
| No. | Name | Public Access | Location & map links | Area\nHa | Area\nAcres | References |
| --- | --- | --- | --- | --- | --- | --- |
| 1 | Aversley Wood |  | 52°25′25″N 0°17′28″W﻿ / ﻿52.4236°N 0.2911°W\n    TL163820 | 61 | 151 | SSSI WT |
| 2 | Balsham Wood |  | 52°07′19″N 0°19′11″E﻿ / ﻿52.1219°N 0.3196°E\n    TL589496 | 35 | 85 | SSSI |
| 3 | Bedford Purlieus NNR |  | 52°35′00″N 0°27′49″W﻿ / ﻿52.5833°N 0.4635°W\n    TL042995 | 208 | 514 | SSSI NNR FC |
| 4 | Brampton Wood |  | 52°19′02″N 0°16′13″W﻿ / ﻿52.3172°N 0.2703°W\n    TL180702 | 132 | 326 | SSSI BCNPWT |
| 5 | Buff Wood |  | 52°08′10″N 0°07′36″W﻿ / ﻿52.1361°N 0.1268°W\n    TL283503 | 16 | 39 | SSSI BCNPWT |
| 6 | Carlton Wood |  | 52°09′02″N 0°24′58″E﻿ / ﻿52.15051°N 0.4161°E\n    TL654530 | 10 | 25 | SSSI |
| 7 | Gamlingay Wood |  | 52°09′57″N 0°11′08″W﻿ / ﻿52.1658°N 0.1855°W\n    TL242535 | 46 | 114 | SSSI BCNPWT |
| 8 | Hardwick Wood |  | 52°11′57″N 0°01′13″W﻿ / ﻿52.1991°N 0.0203°W\n    TL354575 | 17 | 42 | SSSI BCNPWT |
| 9 | Hayley Wood |  | 52°09′33″N 0°06′51″W﻿ / ﻿52.1593°N 0.1141°W\n    TL291529 | 52 | 129 | SSSI BCNPWT |
| 10 | Kingston Wood and Outliers |  | 52°10′06″N 0°03′50″W﻿ / ﻿52.1684°N 0.064°W\n    TL325540 | 49 | 121 | SSSI |
| 11 | Langley Wood |  | 52°03′24″N 0°20′33″E﻿ / ﻿52.0567°N 0.3424°E\n    TL607424 | 31 | 77 | SSSI |
| 12 | Little Paxton Wood |  | 52°15′26″N 0°17′14″W﻿ / ﻿52.2572°N 0.2872°W\n    TL170635 | 45 | 111 | SSSI |
| 13 | Madingley Wood |  | 52°13′00″N 0°02′57″E﻿ / ﻿52.2168°N 0.0493°E\n    TL401596 | 15 | 38 | SSSI |
| 14 | Monks Wood NNR |  | 52°24′18″N 0°14′15″W﻿ / ﻿52.4049°N 0.2375°W\n    TL200800 | 170 | 420 | SSSI NNR |
| 15 | Out and Plunder Woods |  | 52°10′03″N 0°25′33″E﻿ / ﻿52.1674°N 0.4258°E\n    TL660549 | 28 | 69 | SSSI |
| 16 | Over and Lawn Woods |  | 52°06′35″N 0°23′15″E﻿ / ﻿52.1097°N 0.3876°E\n    TL636484 | 45 | 111 | SSSI |
| 17 | Perry Woods |  | 52°17′06″N 0°20′15″W﻿ / ﻿52.2849°N 0.3375°W\n    TL135665 | 67 | 165 | SSSI |
| 18 | Ten Wood |  | 52°10′31″N 0°25′56″E﻿ / ﻿52.1754°N 0.4321°E\n    TL664558 | 17 | 42 | SSSI |
| 19 | Thorpe Wood |  | 52°34′22″N 0°17′28″W﻿ / ﻿52.5729°N 0.2912°W\n    TL159986 | 12 | 28 | SSSI BCNPWT |
| 20 | Warboy's And Wistow Woods |  | 52°25′11″N 0°05′18″W﻿ / ﻿52.4196°N 0.0883°W\n    TL301819 | 42 | 103 | SSSI |
| 21 | Waresley Wood |  | 52°10′37″N 0°09′21″W﻿ / ﻿52.177°N 0.1558°W\n    T 262548 | 62 | 153 | SSSI |
| 22 | Weaveley and Sand Woods |  | 52°10′21″N 0°12′31″W﻿ / ﻿52.1724°N 0.2086°W\n    TL226542 | 76 | 188 | SSSI |
| 23 | West Abbot's and Lound Woods |  | 52°35′54″N 0°26′11″W﻿ / ﻿52.5983°N 0.4364°W\n    TF060012 | 51 | 126 | SSSI |
Question:
how many ancient woods have public access?
Answer:
8