Did it, had to slow down 3 times to recover a bit but kept going. At nearly 49 and 16 stone it is really hard work. Tom and Jerry moment about 15minutes into run, little angel on one shoulder encouraging me, little devil on my other shoulder saying stuff it walk. Calves absolutely stiff and legs worn out on warm down walk, that said I feel like I have recovered quicker after this evening's run. Week 6 here I come.