Never tried posting a pic before so hopefully you should see something resembling a EE Lighting, if not ....
If it's any help to anyone, I use a slightly different method to post images from Flickr. On the page of the image you want to post, click on the white arrow pointing down with a line below it. You get a pop-up window with a range of image sizes listed. At the bottom of that list, there's an option to 'view all sizes'. Click on that, and the image will open in a new page. Right-click on the image and select 'copy image address' then go back to Britmodeller and paste that link into your post. The