The chemical export licences were granted by Business Secretary Vince Cable’s Department for Business, Innovation and Skills last January – 10 months after the Syrian uprising began.

They were only revoked six months later, when the European Union imposed tough sanctions on Assad’s regime.
From what I have read here the chemicals were never delivered and the license were revoked 6 months later but the British government still sell arms to some brutal regimes with extremely bad human rights records.