Very similar, albeit 'pannier'
At least one spare pair of gloves, depending on likely weather. Spare specs.
Toolkit & puncture repair kit, visor cleaning stuff, under the seat. Also, soapless hand cleaner (in the days before sanitiser gel).
Disc lock (although my bikes always had the best-ever device fitted: a 'BMW' logo).
Map book. As good and up to date as GPS is, a map is easier to take in at a glance, and point at and discuss. A-Z regional books are good scale and detail.
[Edit: eg:
https://collins.co.uk/collections/a-z-r ... 1843487975
The A-Z are useful because they show details of motorway junctions, main routes through towns, etc. The context being that a lot of my riding, and so route planning and guidance, was 'A-A' and often ad hoc]
First aid kit. All the usual stuff plus a few extras like tuffcut scissors and big wound dressings.
Then all of the 'training' stuff, which might include an oversize A4 ring binder in a plastic case, books and notes, pens, notepad, etc.
Nick Sanders is famous for having the same for a quick trip around the world.
