Who is the mysterious Weatherfield stout-supper?

There is fevered speculation among the tabloid classes about the identity of the freelance journalist who eschewed the usual proprieties involved and smuggled himself onto the set of Coronation Street. The unnamed journo instead found himself drafted into filming as an extra on the show, sipping pints in the Rovers Return. The episode, filmed about a month ago, is due for transmission this evening and is expected to raise a whole set of questions. What did he see behind the scenes? Did he sign a confidentiality agreement? The Street's ratings haven't been their best for a while. Tonight at least, there are expected to be more than the usual number of showbiz correspondents tuning in.