Just seen that Iberia Express are testing the waters at EDI with twice weekly A320 flights Jul-Aug. A possibility for BHX-MAD in the (I hope not too distant)future?
Am flying IB MAN-MAD-MAN next Fri/Mon (tried my best to go from BHX but cheapest fares were around £300 return with AF/KL

) IB were half that

Will be interesting to see how busy the flights are, also have never flown IB before either!