Finally got the guts to go and give it another go this evening. I took on board all previous advice and took it much slower, I only jogged 5 of the 8 mins but felt loads better and breathing was better. I also walked 20 mins home after and I felt good unlike the first attempt.
I will build on each run and will continue with week one until i can do the full 8 mins. I will do this 😁