Yes very smart idea. There are 30 707s and 90 701s. The 707s won’t be close to enough to replace all the 455s.
Once again I’d like to mention that the 455s are 10 years older than the networkers. They need to be replaced more than their southeastern equivalents. You could argue that the 455s have had many refurbishments, a retraction, etc, but at the core these trains are over 40 years old while the networkers are 30 years old. The interiors are tired, parts are running low, corrosion is at an all time high. In fact to drive my point home further, they’re having to source things like carriage doors from old PEPs now! It’s ridiculous to even suggest moving the 701s to SE because of that. And most importantly they don’t meet modern passenger standards, a lot more so than the 465. I’m typing this on board a packed evening service with nowhere to sit and little room to stand, while the train continues to boil due to it’s lack of any AC.
I am not denying the networkers are in a bad state. They really are. But we cannot just keep trains 10 years older running, and continuing to make South Western commuter suffer