Without quoting numerous posts full credit to @LowLevel and others who put themselves forward to work on a Saturday when not rostered particularly later in the day, although from the posts it seems drunkeness and rowdy behavior occuring even before the journey to the match / event is not uncommon.
At the planning stage when Didcot - Oxford was to be electrified and the fleet of Class 387 EMU's ordered I presumed these would be allocated to the Paddington <> Oxford services then Paddington <> Worcester / Hereford would be 5-car 80x sets. Of course still the issue of the Paddington <> Worcester / Hereford trains serving core stations between Paddington <> Oxford for those travelling beyond Oxford while wanting Paddington <> stations to Oxford passengers to use the EMU's.
..... The root cause is of course that electrification has only reached Didcot Parkway not Oxford, which was meant to be the original terminus.
Then you're pulling a 9-car from Wales / Bristol or West of England work. The issue is that its absoutely rammed to Oxford but 80% of people get off there. Probably one of the only suitable places where splitting might be beneficial, as a 5-car is plenty from Oxford - Worcester/Hereford.
At the planning stage when Didcot - Oxford was to be electrified and the fleet of Class 387 EMU's ordered I presumed these would be allocated to the Paddington <> Oxford services then Paddington <> Worcester / Hereford would be 5-car 80x sets. Of course still the issue of the Paddington <> Worcester / Hereford trains serving core stations between Paddington <> Oxford for those travelling beyond Oxford while wanting Paddington <> stations to Oxford passengers to use the EMU's.