re: London to Paris 1 day trip… ???

Can you subtract a day from the London stint spending two fullish days in Paris? Maybe look at switching your return flight home to Paris as well to save time.

I wouldn’t say a hard no to someone wanting to do something. If you wanna go for a day trip, do it. If it creates a desire to come back for more traveling, then great. However, a day trip to Paris will be extremely surface level if you’re visiting Eiffel Tower, Arc de Triomphe, and eating a dinner in front of the Eiffel tower. I’d imagine like going to NYC and spending your day in Times Square.

As an alternative, what about renting a car in England for a day and seeing a bit of the countryside? I don’t know England but I’ve rented cars multiple times in Europe and it really gives you a lot of freedom to explore.