That original newspaper clipping is confusing.
Although I knew 707's were unpopular at the start, as far as I know they became more popular because of their superior acceleration and door opening/closing times. After being used on the Windsor route many were transferred to the Shepperton route, due this route having poor performance in timekeeping with 455's.
I thought SWT and SWR wanted to keep these trains, but they had to go to South Eastern as they were destined to go there originally when the original SWT/SWR lease expired.
Also with more 707 driver training recently and the increased delay of 701's with the current situation not helping, possibly the 707's stay may be extended even longer.
I'd like to see just one rebranded in SWR livery as it looks very nice.... and perhaps a 455/458 also.