Posting here before my memory fades :) Any help would be appreciated.
Edit, as per request: HXX (Heathrow Terminals 2 & 3), OXF (Oxford), HAY (Hayes & Harlington), SLO (Slough), GWR (Great Western Railway), TfL (Transport for London), PAYG (Pay-as-you-go).
1.- Today (28-09-2022), I purchased...