I did have a go at creating a clock face timetable last year, which I had posted in a thread in this section pf the forum.
The base service I had was as follows:
1) All trains departing Leeds northbound at xx48, with odd hours to Carlisle, even hours to Lancaster/Morecambe (I'm happy for Leeds - Morecambe to be curtailed at Lancaster), calling at Shipley, Bingley, Keighley, Skipton, then all stations.
2) The xx18 left vacant, which can be used for relief trains on short workings as far as Skipton if need be.
3) Alternate Clitheroe trains extended every second hour to Hellifield (with Leeds/London facing bay platform having track reinstated) so as to connect into and out of the Carlisle trains. Also, Preston can be accessed with a reasonable connection at Blackburn too.
4) July and August (or however long the summer timetable is in operation for) would have additional First Class and dining trains (based on when there were HST workings in 2021) running Skipton - Carlisle every 4 hours, calling Hellifield, Settle, Kirkby Stephen, and Appleby, and Blackpool North - Carlisle every 4 hours calling Preston, Blackburn, Clitheroe, Hellifield, Settle, Kirkby Stephen, and Appleby. This would provide a frequency of every 2 hours between Hellifield and Carlisle for the First Class and dining trains which would be overlaid on top of the base timetable.
See the attached file for further details.