Iceland's new brand "the food warehouse" is a slick operation. I used to visit and buy from one of their stores in Scotland when on long business trips.
I would say that a single Iceland (with fresh produce) unit would do well in one location (Onchan?). So having empty units keeps any competitors at bay.
It's the same with Coops in the UK. Irritating when virtually every swipe across the scanner either fails to read the barcode or the bagging area thinks you're trying to knick something.
Hardly tumbleweed town, as far as I know every unit except what used to be Celtic Trader is occupied, including all the office facilities above the retail units.
The manufacturer of the main power source is Wartsila, designed and engineered in Finland (for the most part): https://www.wartsila.com/marine I imagine Wartsila will have engineers on hand in UK in the event of something really serious happening. Wouldn't be surprised if Wartsila didn't have direct access to the vessel's engine management system/consol via satellite connection for diagnosing problems.
Ahhh now we know. It was a switch it off, pull the plug out, plug it back in again and switch it on again moment. Works every time for me.. well, almost!