Two leds,
One give the Orange Alert symbol, The other the Red Alert symbol.
I found the best way was a small blob of Black mastic over the led & then carefully cut nitto foam.
Re turning the light of by other means... It may be possible, but it depends on the spec of the bike .
The ABS is linked via can bus to the ZFE so the ZFE is looking for signals from the ABS module when it powers up ,
Because the ABS module sends a fault signal due to the servoectomy its always going to be seen.
The only way i could see it possible working is to change the ZFE- if i recall the LOW spec ZFE is fitted to non ABS bikes -
there is nothing connected to i think pin 38, which on the basic & high ZFE's is the link to the ABS module -
So in theory if pin 38 is not looking for an ABS signal and it dosent get one, then the led shouldnt light -
However if you have a Basic or High level ZFE, then changing to a low will remove other functions as well
Also the cheapest ZFE i could find was £80 i wasnt prepared to have a go Blob of mastic & foam vs £80 i know which was cheaper