Until some time in the 1990s the UK used to end summer time near the end of September. There was about a month when UK had gone back but mainland Europe had not.
Apparently it caused issues over ferry timetables and connecting trains in the UK.
It affected me, because at that time one could get German television channels in the UK live and in the clear on the Astra satellite system (commonly called 'a Sky System' by many) as Sky simply had some channels on the Astra platform, so if one had the platform, one got the extra channels too. There was one show I liked that was regularly on on Tuesday evenings, and it was usually 7:15 pm to 8:15 pm UK time each week, but for that month or so it started an hour later UK time, as it was always broadcast at 8:15 pm in Germany.
www.youtube.com/watch?v=tWhkhgofLWE
Jolly and relaxing after a busy day at work.