For this project, the flange had to be accessible after the installation of the TP-cover. Therefore, a removable segment was incorporated into the frame design. The cover tent was oval to make space for the removable segment, without affecting the sturdiness of the TP-cover. By this means, offshore work, with the use of the flange, could be conducted without demounting the whole TP-cover.
https://www.jandenul.com/projects/burbo-bank-extension-offshore-wind-farm-united-kingdom