| 1.1a | April 1998 | |
| 1.1b | 27/10/1998 | JS bug on modreqs1.html fixed |
| 1.2a | 29/10/1998 | Links to snow model added, plus some minor bug fixes |
| 1.3 | 19/11/1998 | Links to DEM error work, DEM derivation from orthophotos and canopy variation work added. |
| 2.0 | 4/3/1999 | Interactive fire models added. |