Some gaps in my knowledge, then, which you've now plugged. Thanks everyone.
EEyin, didn't know about the Dumfermline 1/2 on Sunday. Although, I think a 1/2k (yes, k) would be more my league! Most annoying thing about races and triathlons is that they always seem to take place on Sunday mornings. I work on Sunday mornings! Why can't there be races on Saturdays (or, at least, more often)?!