Useless Citroen dealers. The first one I rang said the keys were not available, but if I cared to bring the van in, one of their engineers might have "something in his toolbox" that could remove them.
The second one told me they were only supplied with the roof bar kit.
At the third attempt the parts dep't phone was answered by a well spoken young sounding lady. I thought, here we go, she probably wont have clue. But no. I was pleasantly surprised. She looked through the spares list and came with a part number. Apologised for not having it in stock, but could probably get it next day. After I explained that I'd like it sooner so I could get the van into the garage, she checked and gave me the name and phone number of another Citroen dealer about 25 miles away who according to her computer had one in stock. Rang them and they actually had 2. Picked it up and after a struggle with the rusted screws finally got the bars off and the van in the garage.
What annoys me is the sheer incompetence of the assistants in the parts dep't of the first 2 dealers I rang. Both male and by the sound of it, they just couldn't be bothered to check the parts lists as the young lady did. I assume they all have the same system and network. Mike.