suffice to say I wasn't mentally prepared to spend that long on my bike
Ditto. I started day 2 and just wasn't up for it mentally.
I reflected in Llandovery and, despite going strongly, decided that I was punishing myself for no reason as all of my cycling goals, bar completing this ride at the first time of asking, would be achievable if I didn't do it but would be in jeopardy if I did (the same feelings were building up as I had in 2008, which I ignored and ended up not riding over the almost all of 2009).
I rode back to the start, having to look in the eye those who were stronger than me. Oh the shame (LIGAF)
As Iddu said to me as I sat with a coffee looking sheepish, a ride over 400km is all about the mind not the body. Very true words. I'm going to be doing much of day 3 tomorrow (well, I am on my holibobs) which somehow doesn't seem that daunting in isolation.
Good fortune to those out on the road, most of whom looked resolute at the start of day 2 when I returned to Llanwyrtd Wells