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However nice and lovely it may sound, there are some downsides - most yards and even marinas will disconnect the water hoses and ice can be a real problem.
Ranworth can freeze over up to the dyke or up it, S Walsham to well up Fleet Dyke and much north of Barton can be an issue - and believe me , it does not take much ice to stop movement. A 1/4 inch sounds nothing but that will stop you most times.
However Christmas of late has generally been OK but build issues into the plan - personally I would rather be in a riverside cottage with access to a day boat with warm air heating!!