Would appreciate some help thinking through the logistics on this one. We'd like to do a day trip to Dover and/or Seven Sisters, but need to catch the last Sunday night Eurostar onward to Brussels.
Is the best option to rent a car and drop in Ashford and catch the last departure from there? The only wrinkle is that car rental offices are closed Sunday, so I will need to check into after hours drop-off options.
If I can't make that work, what would my other options be? Simply rent from London and return to St. Pancras before the train? Anything other options? Am I correct that doing this day trip entirely by public transportation would be too difficult?