Thanx SToppers,
Lots of good advice. I was a little too close to thé Kerb. Speed was perfect. I was using front brake only.
After much thought on the incident I have come to the conclusion that the front brake locked up a half metre before my intended stopping point. This caused a large lurch to the left because I must have been leaning slightly that way or, being a little too near the kerb the camber of the road was greater there. I didn't get a chance to even put my foot on the road b4 Terese and I had to roll away from the bike.
The aftermarket brake lever has a cam adjuster where at setting 1 the lever is 4 cm from the grip and setting 5 is 10 cm. I had it set at 3. After the crash I went to a parking lot and practiced stops and manoeuvres for an hour and half and found the setting that best suited stops was 1 but this setting didn't feel safe at highway speeds so I settled on setting 2.
I also checked the front wheels freedom of rotation and was surprised at how much effort I had to make to get the wheel to spin. I went to my nearby Honda STealer and spun the front wheel on a new ST and it rotated just a little more freely. The mechanic said brake pads on a new bike are tight and my ST might benefit from a brake bleed and a new set of seals because dirt might have gotten into the calipers causing undue friction. I mentioned that the brake fluid is milky and the mech said that this also indicates the need for new fluid.
So, in conclusion, I will change the brake fluid and practice stopping using the back brake - something I have never done before at stop signs or traffic lights. I have always braked with a feather touch in car or on bike but this is not easy to do on my ST.
BTW : Andrew thanks for the offer to go halves in new mirrors. I cut myself out a new mirror from a mirror tile and then realised that the new mirror is optically different to the right-hand mirror. But I like the new setup because I see the left traffic now at actual distance which seems safer to me. However I also cut out a first mirror back to front by mistake. If you like I will spend some time grinding its edges to the exact shape and send it to you if you ask nicely. However, having a close mirror on the right side might not be the ideal way to go. Also, I have found my DIY mirror vibrates more than the OEM.