To an extent, I agree with what you’re saying, but your plan relies on TOC (both present and future) and the DfT adhering to the agreement and not pulling the carpet from underneath the guards. Whatever happens, guards should retain and be assessed on the training they currently have. But there’s no point guards having that training, if the train departs DOO because turnaround times have been crushed and the guard misses their next working by 3 minutes because of a track circuit failure somewhere.
How about this?
1) All guards at all locations are certified on both the new trains and the older ones which still operate with a guard operating the doors
2) The drivers operate the doors on the new trains and the guards have a customer service and ticket collection primary reaponsibility but keep all the operating knowledge and training which doesn’t include the doors
3) All guard depots as far as possible have a mixture of both sorts of trains in their workload, so everyone is treated the same
4) Parameters around the new trains running without guards in ‘unplanned’ situations are agreed with the RMT and SWR so that the same rules are used for working out contingency gaps between trains like you mention regardless of the type of train
5) All the depot numbers of staff get agreed now and in the future in the usual way
SWR get their way with the new trains operating with drivers and get the benefits they want performance wise but the guards keep all their operational training, and retain industrial power to stop the service at least in some form on the old trains, whatever happens. Every guard stays in the same job, the same training and therefore gets the same pay rise and benefits negotiated for them with the RMT in similar control to how they are now. Every guard still ‘matters’ to SWR in both customer service and operational training.
Build up such a deal, sign it off togetherand start repairing the damage on both sides so that the issue can be kicked down the line for another ten years?
Who knows if that would be acceptable to SWR, but they will certainly want the strikes to end. The window where the RMT have any control over the agreement is closing rapidly. A solution forced onto them could be far more precarious for the guards’ concerns.