Patna in United Kingdom offers a unique experience to travellers. The nearest major city to Patna is Edinburgh. Edinburgh is bestowed with interesting set of attractions like Edinburgh Castle, Greyfriars Kirkyard, The Royal Mile. Also, to reach Patna, you'll have to take a flight to Edinburgh; so its not really a detour. And even if it is, the city is worth paying at least a quick visit. 1-2 days is an ideal duration of visit to Patna.
Patna is an affair to remember, follow this apt itinerary of the place and return home with a bunch of memories.