Corrie bosses film dress rehearsal as back-up to live show

'Coronation Street' bosses have a back-up plan in case of a technical hitch on tonight's live episode.

With producers battling problems with adverse weather conditions and the issue of troublemakers hoping to sabotage the hour-long extended special - which is being filmed as part of the ITV1 soap's 50th anniversary celebrations - executive producer Phil Collinson has decided to record the dress rehearsal as a precaution in case something goes wrong.