Clematis Bird hide structure help
New here, any help would be welcome. We moved into a new house in October and the garden has a bird hide in the back corner which is covered in what I believe is a clematis Montana and a rose. The hide is a wooden structure. Photos attached. At the moment it looks a mess, and wanted to know if we need to go anything to it? It looks as if it need a good cut back, but from the little I’ve read you shouldn’t cut this clematis until after flowering. If there’s any advice on how to keep this looking good with the clematis and rose (??) in the spring and summer I’d be pleased to receive it.