What to do with teh HSTs

The HST 125 Intercity rolling stock that runs at present on the Great Western and Midland Mainlines ( and the East Coast), have Mark 3 carraiges. These are in an unadapted manual door opening state at present. However The Chiltern and Wrexham and Shropshire rail services have developed an adapted format for these carriages that could be implemented. With new locomotives these could run to SW England, Swansea / Carmarthen & Lampeter, Hereford and Worcester services from Paddington, Midland Mainline services and on the Oxford - Marylebone services once Evergreen 3 is built. Then when IEPs (the new trains) are built and enter service they could be further cascaded elsewhere. This was advocated in teh letters pages of Rail magazine.