Look into Dutch “University Colleges” - there’s even one for musicians (they get a BA or BS, but can add music to their studies).
In France, you have Sciences Po Reims, dedicated to Transatlantic relations (ie., politics, sociology, history, economics… applied to North America and Europe).
You also have ESSEX BBA, which is managementwith an international flavor.
Deadlines should be around now or in January.
In Scotland, the “ancient Four” (Edinburgh, Aberdeen, Glasgow, St Andrews) have met competition from excellent programs at Stirling, Strathclyde, Herriot Watt, and Edinburgh Napier. Edinburgh is a terrific city and the Stirling campus is very nice, too. Aberdeen is less competitive than St Andrews for Americans.
In Wales, Cardiff University is Russell Group. Relatively easy access. Rainy, mid weather year round, lots of attractions/visits.
Swansea U is in a small town by the sea.
In the UK, Durham could be of interest (it’s a “residential”/collegial university). UEA, Bristol, Bath, Exeter, Sussex, York, Loughborough, Nottingham, could be of interest if she wants traditional British universities. For a relatively prestigious university that neverheless has a less competitive access, there’s Queen’s Belfast. (Their international relations with Conflict&Resolution concentration is extremely strong, for obvious reasons!)
UCAS lets you apply to 5 universities only (and 1 major for all, for which you must describe your qualifications in a statement), mixing England, Scotland, and Wales. A good mix would be 3 Scottish universities, 2 from Cardiff, Bristol, Bath, Durham, York, Queen’s Belfast.
She’ll need SAT Subject test results (typically, 3, related to her future “course” ie., major, with 700+ where they want A Levels A or 600+ where they want A-Level B).
Deadline is Jan 15, 5pm British time.
Finally, Ireland has lots of universities, some preparing for a 3-year Bachelor’s degree (Level 7 degree) and some preparing directly for a 4-year Research Bachelor’s (Level 8, or “Honours”) preparing for a Master’s degree. You can “top off” you Level 7 degree with a Level 8 year. Maynooth’s Arts program is very easy access, basically a safety. Trinity Dublin is extremely selective. In between, you can check out CAO to search for “courses” (majors).
Scotland, Dutch University Colleges, ESSEC, Sciences Po, and Maynooth Arts will have several subjects in the first 2 years.
English, Welsh, Irish (NI and RI) degrees will be single subject or, at most, “joint” (ie., 2 subjects).
Canada: McGill, Concordia, UBC, Simon Fraser, Xavier, Mount Allison, Lethbridge, Bishop’s, are all topnotch, but very different. It’ll be very similar to grad school for undergrads at the former, and closer to public LACs at the latter.