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I tow an Elddis Avante with 2.0 Acenta 4wd plenty of power, easily tows on country roads and will easily exceed the UK limits, does 26-28 mpg towing and van doesn't upset the handling and with this engine you can use 6th gear when cruising at 55-60 mph.
Have towed from rural Argyll to other areas of Scotland on A/B class roads and 2 trips to Wales so experience of variety of routes.
The car replaced a Vauxhall Antara and is both quieter and faster accelerating plus is much cheaper to run - Antara 22mpg max when towing and around 38 solo, x trail regularly hitting 50+ mpg solo