Thank you Martin, I appreciate your reply.
The approaches consist of a NDB/DME at Sligo and a LOC/DME at Donegal, no VOR/DME at either location.
I perhaps should have mentioned that I can receive all navaids as well as perform both approaches in the EMB110.
I did, however, fly the ILS RW04 into LTBH Canakkale earlier, and the DME was definitely working OK.