So on Friday I gave W5R3 another go and had to stop after about 10 minutes or so with pain in my heel. I'm pretty sure it's plantar fasciitis , but have an appointment this week to get it properly diagnosed. In the meantime, I've been doing the recommended heel stretches.
I'm so disappointed as the run had been feeling good, and do-able so I was really looking forward to progressing onto W6.
I can still go to the gym and hopefully maintain the level of fitness that I've got too, but obviously need to be careful and take some proper advice.