W3 R1 - the one with the 3minute runs!
I did it. Two weeks ago I could barely run for the 1 minute - I really didn't think I'd manage 3 minutes (twice) plus 2 lots of 90 seconds. I did find the 2nd 3 minute run really tough, but I just kept going and now I'm so glad I did - and I can chill for the rest of the weekend!
The interesting thing was that at the end of the first 90 second run I recovered and could speak and breathe normally much more quickly than I managed on my last run - so things must be improving/progressing.