I just realised that in using an app, my weeks/runs are slightly different to everyone else using Laura. I kind of wish I'd known about Laura earlier as I'd like to be on the same level as everyone else, but I also find my own songs really motivating and I use them to keep me going (i.e. I'm not allowed to look at the timer until a song has finished etc) so think this is the best route for me.
I don't think it's much different until next week, though I'm not really sure what the podcast timings are. My Week 4 is:
Warmup - 5 mins
Jog - 3 mins
Walk - 2 mins
Jog - 4 mins
Walk - 2 mins
Jog - 5 mins
Walk - 3 mins
Cool down - 5 mins
I've been adapting them to suit me a bit anyway so I'm not sure it matters too much. It's also a week shorter than Laura, but I don't do my first 20min run until Week 6, Run 3 rather than Week 5, Run 3. Weird.
Anyway, I set out to do W4R1 today at about 8pm, as it's been absolutely sweltering today, and the heat killed me throughout Week 3. Very glad I did, as it was the perfect temperature and I completed all the runs, so I'm very chuffed!
I struggled most with the 4 minute run, because I was running uphill and developed a stitch about 2.5mins in. I walked for 10 seconds to get rid of it, then completed the last minute (just about). To compensate for my walk, I jogged for an extra minute on top of the last 5 minutes (much easier going downhill. It's only a slight incline, but can really feel it going up), meaning that I only walked for 2 minutes at the end.
At the end of all of my runs so far, I've run for the 5 minute cool down period instead of walking, then walked around my street for a while to cool down instead. It all started in week 2, when I wanted to see how far I could run without looking at the clock, and taking it slowly managed to run the entire 5 minutes (helped along by a bit of Take That haha). I've been doing it ever since, partly to push myself, and partly because I walk an extra 5 minutes at the beginning to reduce the amount of running uphill I have to do, and so it gets me home faster!
I don't seem to be struggling with it at the moment, but as the runs get longer, it'll probably be something I have to stop. Because I did it today though, and will do it for the rest of the week, it means I'm officially running longer than I'm walking! This makes me unbelievably happy, considering that 3 weeks ago I could barely run for a minute at a time! Progress is being made, slowly but surely. I will run the entire 5k Race For Life in July!
Positive thinking 
W4 R1 Complete. Thank beep.
I've amazed myself...W4 R1 completed!
W4 R1 done
W4 R1 again still not there
Did W4 R1 and it didn't kill me!
