John, I just read another thread by IanRB(?) where you replied and asked about filters. The effect he got of with the transmission lines is what I was referring to with my comment to you. Waiting until after sunset when the sky is painted with beautiful colors.
Almost any lens is prone to flare when shooting directly at the sun, some more than others. A lens hood will help if the sun is out of view (and a good idea to have regardless), but with direct shots at the sun, a hood will have little/no benefit.
I halfway expected you shot those at f/22 because of the "spikey" effect Zada was curious about. A CPL (circular polarizer lens) and/or ND (neutral density) filter may have helped in your photos. Each one will block that amount of light that reaches your sensor/film.
A CPL will boost colors and is most effective when at 90° to light source though. The ND does not change color, but allows slower shutter speeds. But I don't think slower shutter speed will assist you in these situations. The opposite in fact.
Hopefully someone much more knowledgable than I can pipe in and give their opinion on how to eliminate lens flare. I just try to avoid it myself.