Most of us have done it at some stage in our career. Aired something that was not destined for so being. In the fortunate examples - such as this  - there are no expletives.  Tony likely kicked himself, though, as a perfect chart opener was not aired on 11th Jan 1981 as he no doubt produced - but an earlier version. In pursuit of excellence - he'd evidently tried it twice. Those sort of things usually make a presenter so annoyed, they mess up everything after. Tony didn't though.