After a disappointing 'practice run' on Tuesday where I essentially expired after the fourth 60 second run and may have told Laura to do something unspeakable when she suggested keeping up the pace!
Anyway - tried it again today - listened to the advice to slow it down, and then slow it down some more, and it worked! The key is definitely jogging at a not much more than brisk walking pace, rather than brisk jogging, if that makes sense. Whereas last time I felt horrendous after the second or third burst of jogging, this time actually felt ok.
Can't say I'm 'looking forward' to run 2 (sport and exercise has never been my thing) but am dreading it much less than I was dreading this rerun. Thanks to everyone for the tips, adivce and support - and if you like me are struggling getting started, believe it really is possible!