If you don't want to wait for the EC 1st Advances for 23rd October to become available (I believe the delay is due to unfinalised engineering plans) then you could go ahead and buy the Standard Class Super Off Peak Single KGX-DHM at ^36.20 (Web only fare - 50% off {plus railcard disc.} available only at eastcoast.co.uk). This is a flexible walk-on ticket so any train on the Sunday would be fine. You can decide whether you fancy upgrading to 1st Class on the day by purchasing Weekend First for ^25. Or ^15 as far as York/Northallerton. Save ^10 and bail out of 1st Class back to Standard for the last half hour or so to Durham! At weekends with East Coast in 1st you still get fed and watered. Sandwich, snacks/cake and non-alcoholic beverages.
Looking at the XC▸ 1st Advance fares for that day, the above option still looks the cheaper and least hassle. With your ticket to/from London on FGW▸ you only have to endure a bus ride to Didcot. Going via XC before 3pm (you did say, the earlier the better, for the Sunday) you have a bus from Oxford - Leamington.
True - plus I'll also have the
OXF» - London return portion. Plus at least on EC if a seat is unreserved at London there isn't a chance of being kicked out at Stevenage!
[Goes down and makes a cup of tea before a XC rant starts]
Shame about no free alcohol - sigh...
Ok, two questions:
*Can you buy Weekend First for not the whole journey? I assumed they upgraded for your whole ticket. Otherwise Cotswold folk would upgrade after Hanborough instead of OXF. Then again, standard on East Coast isn't as bad as XC.
*How long is the web only fare available for? If it goes on for a while, I may wait a bit. But if it's limited offer, I'll snap it up...
Thanks again for the advice!