I think there was a plan drawn up a while back to realign Charlie by straightening and widening it so that it would join the runway some 700m north-east of the 05 threshold. That would still require a fair backtrack distance but there is insufficient land to extend Charlie parallel to the runway all the way to the 05 threshold without infringing the strip width. That realignment may perhaps be done at a later date but I have no direct knowledge of that being the case.