[Al_The_Man]

The safety implications are obvious – unpredictable movement of spinning cutters is extremely dangerous.

One other thing to be aware of is that hitting the e-stop button on the machine wont stop the machine for maybe 5 seconds, perhaps a little bit longer. This applies to the soft e-stop button in Mach too. It's probably legally allowable but five seconds can be an awful long time if something is going wrong.

Rick

It sounds like they are not conforming to standard safety regulations, here in Canada the machine would have to be CSA approved, IIRC the British Standard is BSI.
There may be another now under the EU.
A 5 second delay in an E-stop would normally be considered unacceptable by any standard.
The E-stop sounds like it is software implemented instead of hardware operated.
Al.