Typically it'd be non-English curry sauce from a chippy. Why do I phrase it like that? I dunno English Curry Sauce just, doesn't vibe with me - it's overly sweet, it's usually a little on the thin side and I'm not exactly a fan of "lets throw bits in this sauce", IIRC it's usually some kind of chopped fruit or something. The sweetness also balances out the spice of the curry powder too much, not because it's mild but it just tends too much on the sweet side.

Meanwhile the kind you get from chippies that don't claim to be "English" (I say it like this on purpose) typically favours a thicker, spicier sauce that still retains a little sweetness that better compliments chips IMO

Otherwise I just stick with the usual condiments with preference based on usage really. English Mustard I guess? I think what we're establishing here is I want my sauces with a kick I guess??????????