After it had been looking good, sitting in profit by the 11 OCT and well out of the money - there was a big down day yesterday of -4.0 % ( 0.60c) at one point in the day. As the strike price is 15.50 and it got as low as 15.85 in trading through the day I figured the risk of being exercised was too large by Thursday, and I got out of the short leg ( sold position) for a buy back of 0.06 c...after brokerage it was about breakeven.
As there is still 4 more credit spread positions open that look to finish in the BLACK I am not worried by 15 October.