I was thinking about how they (from posts I've read) refuse to connect things they don't like - such as refusing to connect a supply to 16mm tails. I'd have thought their ESQCR would have something to say about connecting a supply when it's clear there is equipment in-line that is not rated for the current rating of their fuse.No, as far as I know there is no requirement for the DNO to make their equipment suit the customers installation. They provide a standard size and type of supply and it is up to the customer to ensure that their installation is suitable.
I'd have expected them to offer 3 choices: stay with a 60A fuse, change the VOELCB to one rated for 100A and we'll fit a 100A fuse, or stay without a supply.