The most common route involves driving from London to Holyhead in North Wales (approximately 427-438 km or 265-272 miles). Drivers must then board a ferry with their vehicle. Driving is on the left in both the UK and Ireland. UK motorways are generally free, but some specific tolls (e.g., M6 Toll, Dartford Crossing) or city charges (London Congestion Charge, ULEZ) may apply depending on the exact route and starting point within London. Fuel costs are estimates and will vary by vehicle. Ferry booking for the vehicle is essential and prices fluctuate.