[steam for ever]

The 125 HST is supposed to be a nice train to ride on, but I have never done so myself.
Now that plans to elcetrify the Great western mainline have been put forwars with the intent of replacing these and with new deisel replacements being planned, will there be a movement to preserve them?
I have heard many people say that If only we knew about steams demise, we could have started to preserve them sooner.
Srely we should save a few of these.
If they become rare then perhaps Richard Branson could start a charter bussiness with them or something.
Something to think about anyway.
I think that the mark three stock will most likely stay, but what about the locos?
I know for certain that the one sharing a hornby livery will be saved as Hornby themselves will not allow such an advertisment to disappear.
What should we do?