To write an event report you can either simply add the report to the event listing, add a new event, or post a forum topic. If you add a new event or forum topic, please amend the original event listing to add a link to the event report.
If you have photographs of the event, attach them as file attachments to the report. There are file size limits (of 2MB) so you may need to resize your images before upload.
To do: advice on how to produce and use photos of a suitable size ot go on the web.