I have been spoiled with the EBP for some years so have not had the need to keep track of lounge access rules. But am now flying BT in C-class out of ARN. Will this give me access to the SAS lounges given the current agreement? maybe only the Business lounge?

Or do BT use another not-so-good lounge at ARN for C-pax? I am on SK ticket stock and SK flight number and I am SK EBG and BT VIP...