Dr Christianne Glossop, Wales's chief veterinary officer, says it's early days for a vaccine against Schmallenberg virus, but one is being developed.
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Rain in the east will clear through this evening leaving much of the night drier with clearer spells.
Emergency services are being put through their paces in a two-day anti-terror exercise.
Carwyn Jones includes repealing the UK government's new restrictions on public sector strikes in his legislative programme.