There are times when an ordinary hotel just isn’t interesting enough – and resorts and rental providers are coming up with increasingly out-there options to satisfy our appetite for quirky places to stay. People can sleep among the canopies in a treehouse, take up residence in a shepherd's hut or even spend the night in a former military helicopter. Here's our pick of the best alternative accommodation options around the UK, from a former coastguard's lookout to a converted military chopper.