AbstractUntil relatively recently the majority of large publicly listed UK companies have not produced annual environmental reports. Of particular note is the slow take‐up of environmental reporting amongst the UK's top 350 companies, the FTSE 350. Using the results of a postal questionnaire, the reluctance of a majority of the FTSE 350 to voluntarily report is linked to 13 drawbacks. Results from non‐reporting respondents to the questionnaire allowed the relative importance of these drawbacks to be placed in a ranked order. Senior management doubt over the advantages of reporting was shown to be the most important drawback, closely followed by the effort required for data collection. A comparison in the uptake of corporate environmental management practices (other than reporting) was also made amongst reporters and non‐reporters. Reporters were shown to have a generally higher level of uptake, although company sector type and size was influential on environmental engagement overall. Copyright © 2006 John Wiley & Sons, Ltd and ERP Environment.