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:
| Date | Ship | Nationality | Tonnage | Fate |
| --- | --- | --- | --- | --- |
| 16 May 1941 | Llangibby Castle | Great Britain | 11951.0 | Damaged |
| 13 April 1942 | Empire Progress | Great Britain | 5249.0 | Sunk |
| 30 April 1942 | Ashkhabad | Soviet Union | 5284.0 | Sunk |
| 2 May 1942 | USS Cythera | USA | 602.0 | Sunk |
| 2 November 1942 | Dalcroy | Great Britain | 4558.0 | Sunk |
| 2 November 1942 | Empire Antelope | Great Britain | 4945.0 | Sunk |
| 2 November 1942 | Empire Leopard | Great Britain | 5676.0 | Sunk |
| 2 November 1942 | Empire Sunrise | Great Britain | 7459.0 | Damaged |
| 2 November 1942 | Rinos | Greece | 4649.0 | Sunk |
| 7 February 1942 | Afrika | Great Britain | 8597.0 | Sunk |
| 7 February 1942 | Daghild | Norway | 9272.0 | Damaged |
| 7 February 1942 | Henry R. Mallory | USA | 6063.0 | Sunk |
| 7 February 1942 | Kalliopi | Greece | 4695.0 | Sunk |
| 7 February 1942 | Robert E. Hopkins | Great Britain | 6625.0 | Sunk |
| 7 February 1942 | Toward | Great Britain | 1571.0 | Sunk |
| 8 February 1942 | Newton Ash | Great Britain | 1571.0 | Sunk |
| 11 May 1943 | Antigone | Great Britain | 4545.0 | Sunk |
| 11 May 1943 | Grado | Norway | 3082.0 | Sunk |
Question:
What is the highest tonnage for a ship from Great Britain named Newton Ash?
Answer:
1571.0