Derry is the one city on the island that sits in two systems at once. Derry City play in the League of Ireland, travelling south every other week, while the city itself sits in the UK broadcast market. The Brandywell on a European or league night is the local occasion. Alongside that, the Derry footballers are a serious force in Ulster and play their county games at Celtic Park, confusingly sharing a name with the Glasgow ground. For households here that split is the whole issue: the soccer coverage that follows the club is often Irish, while the broadband, the aerial and most of the neighbours' packages are British. Being able to test both sides on one service, in one evening, is worth more here than in most places.
Derry sits on the border in a way that shapes everything practical about telly here. Households across the Bogside, Creggan and the Waterside routinely want Irish and UK channels together, because the club plays south while the city sits north. Openreach and Fibrus both serve the city and coverage is reasonable, improving as fibre expands out towards Culmore. Cross into rural Donegal a few miles away and the picture changes entirely. The specific test worth running here is the cross-border one: check whether a single service genuinely carries both the League of Ireland coverage that follows Derry City and the UK channels the rest of the household expects, because that combination is exactly what conventional packages on either side of the border tend to miss.