Ok, I really should join here, I run quite a bit, although I bike more (school run).
I used www.runlondon.com to work out that my standard route is 4.5 km, although I did more like 6 km today, because I did no biking today (hurrah!).
I am pretty slow, 4.5 km is 30 to 35 minutes. But I'm a big girl, so that's ok. I only run on grass, thanks to knee issues etc.
In winter, I wear tights, and sometimes a long-sleeved top. A hat if very cold. I am always too hot. Today, it was raining a bit, and I was wearing my lightweight shorts, and a tshirt, and I was tempted to take off the tshirt!
Oh, dumb question - I have Nike shorts with a built in pants thing ... am I not meant to wear my pants under that?
I think I'd like to do an off-road race, but that Grim thing looks a bit ... ahem ... hardcore for me.