Yes mate, you need to mix it up a bit otherwise you won’t improve, longer short run, medium length runs at say 75% -80% effort and a flat out one every so often, normally that’s be Park run or an actual event for me but obviously they’re all cancelled currently so it’s hard to get out and do that.
I normally run 3-4 times a week, Monday is a slowish run, Wednesday a bit more intensive, if I’m doing park run it’s flat out on a Saturday then Sunday is a LSR.
@Stuuuuuu can offer more advice, he’s the Bluemoon expert,
I think it’s Brendan Foster personally with him living up that neck of the woods.....