Did anything get pushed up via Denton and Victoria
Unlikely. Given that only Northern Rail crews would sign that route it rules out most through services going that way.
The Wigan Wallgate to Buxton service that departs Piccadilly at 18:21 would probably have been the only service that could have usefully gone that way while platforms 13 and 14 were closed at Piccadilly. However, when you consider:
* The Buxton passengers would have been at Deansgate, Oxford Road and Piccadilly not Victoria
* There may not have been a path or a through platform available at Victoria
* A crew change may have been required to send it that way, if the crew working the service didn't sign the Denton line
It's probably unlikely the Denton line was used. It's more likely that service would have been terminated at Oxford Road and restarted from platforms 1-12 at Piccadilly, subject to an available unit and if no available unit then cancelled from Oxford Rd onwards.