Hi all,
I can update now was well. I had to request a mileage credit from Miles & More who credited my account for the BRS-BRU segments within days of receiving my request.
Unfortunately the segments between BRU-ZRH weren't eligble for credit as they are a code share with Swiss. I understand that the terms of Miles & More credits mans the flights need to be on SN metal but I do find it rather strange when they won't credit a code-share when the code-share partner is a key member of Miles & More!
Anyway, this just means I won't be using SN from BRS much in the future and will be trekking back down to Heathrow instead - particularly now since Swiss have moved to T1.