Pete - the bmir website doesn't list Graz as a destination (yet). In the past I've seen that the first day routes go on sale, the cheapest fares quoted are stupidly high (essentially a fully refundable fare only someone desperate would buy), only for more realistic fares to appear a day or two later - presumably down to some sort of IT systems issue. Is it perhaps possible that BHX-GRZ appears with more sensible fares in a few days time ?