(06 Jun 2016, 6:57 am)South Tyne Lad wrote There used to be a regular X20 when the Pronto brand first started but it got withdrawn so pretty much says it all really.
Don't forget the X20 which ran a few years prior to that.
There were a few variations prior to it's final incarnation (before a few years pause and the Bishop extension using deckers), which included branding for the PB Swift.