Thank you for the feedback.
I didn't think it was possible to monitor the DME from a non co-located navaid, but it's always worth checking.
The use of the FIX page helps, but doesn't necessarily fulfil the requirement of monitoring (from a nitpicking point of view - as lawyers and TREs are prone to do 😉
, but combined with an ident prior to both pilots tuning the ILS, and monitoring of ANP, is probably as good as we can get on the super tractor.