What is the fine-grained topic of the following text: Driving to Porto from the UK is certainly not an easy trip; Google reckons 20-26hr of driving, and it's not something I'd undertake lightly, although it does at least have the advantage of being able to bring your purchases home yourself, rather than having to send them or pay for extra luggage (and packing). Only return the topic.
Driving from the UK to Porto