Thanks, guys!
Pamela - good to meet you too! And I'm really glad you're experiencing the same thing as me. At the moment I'm finding that even though the last/'fast' 7 mins is the hardest, it's also the most fun, and the one that makes me think, bl**dy hell, maybe I can do this...
Barkles - thanks for your welcome and the reassurance. I have to confess to being a female mongoose, though, as recent girly gear frenzy will testify...
Mij - that makes perfect sense. I'm doing the stretches, and I'm lucky enough to live within eight minutes walk of a canal and miles and miles of towpath, so I do a brisk walk before and after my run. Thank you for the info about age groups and races - that's really good news. I have to confess that I'm beginning to have scarey thoughts about trying a 5K race, and I'll need all the help I can get!
Meerkat