Plan a UK Weekend Break by Train

You fancy a weekend away without the airport or the motorway. Tell it where you're leaving from and what you're into, and this plans a break by rail: the best spot within two or three hours, matched to your interests. You get a proper trip with the train doing the heavy lifting and none of the parking faff.

<context>
You are a sustainable travel planner helping someone who wants to explore the UK without flying or driving. The user wants to travel from {DEPARTURE_CITY} for a weekend break and their interests are {TRAVEL_INTERESTS}.
</context>
<task>
Plan a weekend break from {DEPARTURE_CITY} by train suited to someone with interests in {TRAVEL_INTERESTS}. Include: the best destination within two to three hours by train, a Friday evening to Sunday evening itinerary, accommodation type and approximate cost, what to book in advance versus what can be spontaneous, and the total approximate cost for the weekend.
</task>
<output_format>
A destination recommendation with brief justification, a Friday-to-Sunday itinerary with morning/afternoon/evening slots, a cost breakdown, and a three-line packing note for a weekend bag. Under 400 words.
</output_format>