I've never heard of anyone attending a SPAD. Generally, at least at my TOC, the Driver will take the unit ECS to its destination and then be met by the on call DM or pass to the depot. Even the most serious SPAD we had never had anyone 'attend'
I can only think of a couple of SPADs where a Driver refused to continue but even then they were met by another Driver and relieved.
Med screen guy is pretty quick to arrive at the depot