The avoiding line at Didcot was four track up until MAS signaling came about in the 60's. Likewise there was a four track section between Radley and Kennington Junction (Sandford). I remember using those quite a lot. There was also four tracks from Oxford to Wolvetcote Junction. The down lop isbeing rebuilt at this time. The Up loop remained. I also remember using the down loop (goods) a for number of times. It nice to see it coming back once again.
I believe there is talk of a flyover being bult at Didcot East, similar to that at Reading so perhaps a new link off the Newbury line could be diverted more to the east and south side of the mainline to be able to use the new flyover!. The DN&S could be linked to the Southern at Whitchurch and either run down the main line to Southampton or possibly by a reopened Fullerton route. There are ways and means if the money and political will is there.
I believe there is talk of a flyover being bult at Didcot East, similar to that at Reading so perhaps a new link off the Newbury line could be diverted more to the east and south side of the mainline to be able to use the new flyover!. The DN&S could be linked to the Southern at Whitchurch and either run down the main line to Southampton or possibly by a reopened Fullerton route. There are ways and means if the money and political will is there.