Only reason for the change in 'transport' was that I've broken the Diamond Back.
I was getting a few funny noises, the odd click on the last mile home. Checked and couldn't see anything loose, so put bike away. Getting it out this morning, I checked again and the rear wheel was loose. Looks like the freehub has come undone on the inside, or have a snapped axel. That's tonight's investigation. The cones felt smooth and 'tight' with no play, just the freehub body was wobbling.
Mad panic, how the heck do I get two panniers worth of 'junk' in a small rucksack. Clothes and shoes stuffed in, and out with the CX bike.
It's easily five minutes faster over the ten miles. Bit too fast for commuting - it was one reason I rode fixed in the past to reduce top end speed. Hope it doesn't rain as I'll get soaked.
Managed to bring it in to the office, no complaints from the two maintenance staff, who actually stopped to chat and 'check the weight out'. I explained I'd broken the other bike. One of the guys said, 'oh we don't allow black bikes in the office'. I said 'look there is a bit of white'.
They weren't bothered, even as one was out on the floor washing machine, cleaning the Italian stone floor ! I said I won't get the floor dirty.