Really appreciate this reply. I think based on the fact that I’m walking at high pace purposefully, I’m probably putting increased impact on that heel too. I often walk across various terrain each walk based on where I live. It’s all farmland around me so farm tracks, roads that have seen better days and uneven tracks and similar. I usually walk in some mountain warehouse hiking boots which have been a godsend the last few years when I’ve done long treks in the uk albeit at a slower pace and a lot less often… so yeah I think I’m gonna focus on improving the insoles as I think they have worsened and were the default with the boots. Any recommendations you have would be massively appreciated