Eventually most of these threads about Lydiard seem to work back to common themes and two of the most common are the business of interval work during the base phase and what "really" is Lydiard training and what isn't. Both of them relate to the larger business of the difference between describing a general approach and the actual business of applying that approach.
As you know, Arthur developed a second approach to coaching that was a response to different demands and desires made by the running world now compared to the demands it made on athletes in the 1950s and 60s. The newer approach does not employ distinct phases nearly as much as the original approach did. This is pretty much the sort of schedule I was doing when Barry and I were working together and not all that different from what I learned from Arthur in 1977-78. It's been fairly well publicized in all the normal running informational outlets but for some reason almost no one acknowledges this approach when they talk about Lydiard training. I'm not sure why. I'd guess it might be because it doesn't look as different from what lots of other people do as the original Lydiard schedules do but who knows? But yes, Lydiard wrote them and yes, there is a some interval work done pretty much year round so yes, it is possible to see training schedules that have interval work included most of the time and still have it be a "Lydiard" schedule regardless of what many seem to believe.
What probably makes such a schedule a Lydiard schedule is the care it takes to avoid overemphasizing the interval work
at the expense of what used to be called aerobic work (I'm giving up on current terminology and have no better way to describe the differences.) The best examples of this approach that I know of recently is what many of the Aussies (Deek, Wardlaw, Monneghetti, Mottram, etc.) do.
Lydiard was very selective about what sorts of training he was ok attaching his name to and which ones he wasn't but some of the time he was ok with one approach and not ok with another that was very similar to an approach that wasn't all that different from the one he was ok with.
The difference for him, as far as I could tell, was whether the person using the approach seemed to understand and value his, Lydiard's, approach. So if Nobby or Barry or Dick Quax or Mark Wetmore or Kim or you or I or a whole lot of other people he knew and trusted put some interval work into a schedule year round and said we're using Lydiard training he likely would have agreed. If someone like Antonio did it he'd likely have gotten pretty agitated about it being called Lydiard training because he would not believe that Antonio understands and accepts his, Lydiard's, ideas well enough.
That's a big part of why he left the shop to Nobby when he died. He wanted to make sure that his legacy was in the hands of someone who understood what he'd created and most importantly how to adapt that creation to various situations. If adaption were not an essential part of making his coaching work he simply could have written up a lot more schedules and published them.