There are a couple of old threads which might be worth reading;
viewtopic.php?f=16&t=115609
viewtopic.php?f=22&t=114285
Our OP didn't mention accommodation plans. Campsites and hostels enroute are likely to be shutting for the winter. Warmshowers, AirBnB and booking.com might help with a bed for the night. There are several chains of motel type providers who don't advertise much apart from their own websites. These are Premier Inn, Days Inn, Travelodge; their prices vary wildly according to demand.
While heading north be aware that bike theft rates are quite high in cities and around tourist hot spots. Keep an eye on your kit. If you want to cross a big urban area, or circumstances put you behind your timetable, you can carry your bike on a train; booking details on https://www.thetrainline.com/journey-planner.
Accommodation in Glasgow for Cop26 is going to be at a premium. There are about 10,000 accredited delegates and their hangers-on expected plus another 20,000 random tourists. Anybody who hasn't already got a bed fixed up might be in trouble.
This site might help; https://ukcop26.org/
The denizens of Glasgow are known as "weegies". Don't expect them to be universally welcoming. It is a poor stereotype that weegies are a bit stabby, but there is a certain history to that. A fair number of the locals are pretty supportive of Cop26, most are looking forward to some entertaining street theatre and are indifferent to the actual event, a sizeable minority are quite upset that they have had this foreign invasion imposed on them in a plague year. The worldwide threat of climate change and the reality of the Cop26 conference are regarded as two separate issues.
Like Thirdcrank said
Best of luck again.if you want advice/ information about cycling routes and other similar matters, then ask questions about that.