A rolling fog and low cloud base has cause the problems,
T34641 - Diverted to Birmingham
BE581 - Diverted to Exeter
BE1431 - Diverted to Exeter
RE311 - Diverted to Exeter
KL1059 - Diverted to Birmingham
WW2936 - Diverted to Birmingham
KL1065 - Diverted to Birmingham
WW2736 - Diverted to Birmingham
As of 16:00 (not sure if left any out).
Flybe are looking into re-establishing the link of Germany with Cardiff, be interesting to see when will it happen.