GWR has not confirmed anything of the sort - uniess you can show us a link to something that says so.
In the short-term, up to the end of this year, it may well be a nine-car replacing an HST in the existing two-hourly frequency, but the enhancement of the London-Cheltenham service to an hourly frequency from January is entirely down to the availability of five-car trains.
In the short-term, up to the end of this year, it may well be a nine-car replacing an HST in the existing two-hourly frequency, but the enhancement of the London-Cheltenham service to an hourly frequency from January is entirely down to the availability of five-car trains.