OK Paul, I sorta realised that with making the most of available time CTL will be what it is. Once time and intensity is maximised there is no where else to go. If I contunue for some more weeks with the same plan then obviously CTL will plateau. I have just decided to take part in a winter xc league as well as some cyclocross races. I dont plan on changing training specifically for these, or tapering in any way, as I feel I need a lot of work on my FTP. But I may change my mind on this.
RapDaddyo, what you describe is exactly what I have been doing. Weekdays I only get to train late, often finishing up near midnight. Mostly indoors on the trainer but sometimes on the road with lights. This last few weeks all my rides have ended with an IF over .84 including warm up and cool down. I have been working days targeting intervals at over 95%, next day over 90% next day over 85% and repeat type plan. I have also switched from doing shorter intervals and 2x20 types to now doing more 1x40 and longer. I thought I might struggle to ride every day at these intensities but so far so good. Think maybe at 8 hours a week there is no chance of burnout or getting too tired.
I will stick with it and see how it goes, hopefully FTP will keep on the up. If it gets to much, which I doubt, or if improvements stop, then I will need to rethink