With hindsight the lessons I learned are fairly obvious. The most obvious to be more careful seating wires, especially those that you cannot see! However this would have been ok had the gear below not failed. This was the result of moving upwards with dubious gear rather than spending the time to improve it or climbing back down. The crack was awkward to use and I was not comfortable enough to place gear easily but I probably could have improved the cam I placed or placed a better wire just above it. I shouldn't have assumed that I could get better gear above or that I would find a more comfortable stance to place gear from.
You need confidence to climb close to your limit and I was pretty confident I could do the moves required but in this case this led to over-confidence as it wasn’t my failure to do the moves which led to my fall. The fact that the route has had few ascents should have led to a degree of extra caution.
One of the parts of this I find most worrying is the cam. As far as I could tell it was a solid placement (albeit in limestone) in the middle of the range in a parallel crack. It was a 3CU which I worry given the large ridges on the cam lobes give a poor surface area to rock contact. With even more hindsight now it probably wasn’t the best placement and I could have done with some smaller cams!