I had a cheap pair from Sports Direct as well. Lonsdale was the brand I think.
I always used shorts with zipped pockets to store stuff but ended up getting a gel belt with a stretchy pouch type thing, that easily holds my phone and key and a gel as well, if required. Think that was from Sports Direct too, for next to nothing.
Thanks Louise, sounds a bit worrying! I've done a bit of reading up on sacrum pain and I'm reasonably confident that this isn't what it is. The pain is much more focused towards the front, and the back pain is fairly minor, more muscular and, I'm now thinking, possibly not really related as it came on a bit later.
Worth keeping what you've said in mind though, just in case.
540 miles now, after a 12.5 miler this morning. Anyone got any elevation stats to compare? I run on pretty hilly terrain and am currently on 60,000 feet of gain for the year. Would be good to get that over 100,000 feet for the year.