Yes guys! The advice worked. Today I ran in the afternoon which was different from my morning runs. I remember getting onto that last 5 minutes! Then I took on board danzargo's (a grad here) advice and not only did my speed increased at the end, but i still had a tankful (I stayed with Laura though, to avoid any injuries)
BIG BIG thank you to adidas1961 , Slow_Rob , henpen90 and runswithdogs for the support too! It sounds like a graduated lol, I am only half way but it feels so good to run the whole way.
I will run week 4 two more times, before I try week 5 next week! Love the support here c: