Not sure what it really means, but Scott Mills is one of the least distracting DJs according to new research.
https://www.thisismoney.co.uk/money/cars/article-13283609/Most-distracting-radio-podcast-hosts-driving-revealed-Mark-Wright-Chris-Evans-list.html
It says Radio 1 though, which is not only inaccurate, but also I can only imagine it applying to his Radio 2 show. How many sounds effects did he used to play on Radio 1, ha.