I recal that the SCS switches were going to be replaced and as such that doesnt seem to have happend is their an alternative that I could use as customer was hoping for SCS06 switches as I demonstrated them in my place.
Sorry we did not go ahead with the SCS switch replacements. You can use any KNX switch (with a UCM/KNX). There are also ELV switches with Dry contacts and leds. T&J have very good ranges see http://tjelec.com/wiring-devices/They have presence in the UK but not sure where it is https://tjelec.eu/