Narrowboat Day Hire offers self-drive narrowboat day hire from Cowroast Marina on the Grand Union Canal in Hertfordshire — 34 minutes from London Euston by train. Choose from four boats (Albert, Victoria, Lavender, Hay Day) for up to 10 people, with full handover training included. No licence needed. Dog-friendly. Perfect for birthdays, anniversaries, family outings, hen and stag groups, corporate days out and quiet escapes from the city.