Did UK govt sanction sales of chemical weapons precursors to Syria last year? BBC and Independent

The Independent says sales were approved in 2012.  UK officials tell BBC that although sales were approved, approval was later revoked and no CW precursors went to Syria from the UK:

SNP Westminster leader Angus Robertson said: "This is utter hypocrisy from the UK government - deploring chemical weapons in public whilst approving the sale of items needed to make them..."