How long is data valid for? Advice published by CIEEM

Species data in an ecological report may need a refresh after a while.

Planning decisions should be based on up to date information, but exactly how old this information can be before it is no longer considered "current" is often a bit of a grey area. In some cases there may be specific guidance, but now CIEEM, the Chartered Institute of Ecology and Environmental Management, has published general advice on the length of time that professional survey reports can be considered valid. For longer projects lasting a number of years the timing of surveys and need to update information is likely to have cost implications that need to be carefully considered so clarity on how long data is likely to be valid for is important.

The advice note on the lifespan of ecological data can be accessed on the CIEEM website here.