Techniquest
Veteran Member
I am almost certain there used to be Oxford - Didcot Parkway shuttles which ran non-stop a couple of years ago, but it seems they all call at Radley now.
Obviously some of the Thames Valley branches would count (Windsor - Slough, plus Marlow - Bourne End at peak times), but both of those have no intermediate stations.
Plenty of the current Oxford-Didcot shuttle services still run non-stop. Just look at the current timetable.
Beaten to it, I was going to confirm from personal observations that there are currently multiple non-stop Didcot Parkway to Oxford and vice-versa shuttles, noting it on my recent visit to the area. On a related tangent, Didcot's just not the same these days, a ghost of its former self!
No non-stop services I can think of in my area, or anywhere else that I can think of.