Just a short stroll from Norfolk's favourite sandy shore, Holkham Bay, The Victoria Inn is a 20-key hotel on Holkham Estate whose restaurant's meat offering solely comprises game from the estate, served alongside locally sourced organic fruit and veg. The star of the sustainable show, though, is the hotel's all-singing, all-dancing biomass boiler, which heats the entire property and its water using wood from the grounds.

The Peter Pan of the hospitality industry, Treehouse was founded on the principle that a hotel should inspire as much childish excitement and adventure as a treehouse. So, rather than beat about the bush, they went ahead and made one. And right in the middle of London, no less. Built using reclaimed wood and filled with upcycled furnishings, the hotel also uses organic cottons, locally produced toiletries and runs eco-conscious composting and recycling programmes.

With a name that does what it says on the tin, this former Dutch detention centre – a barge-like floating platform – was reincarnated as a hotel by Marten Dresen, a social entrepreneur with a singular mission to do good. Towed across the North Sea to its current home at Royal Victoria Dock, Good Hotel was created from the bottom up, with the planet and its people in mind. Think upcycled furniture and locally sourced food, yes, but also a hospitality training programme for the long-term unemployed (where every student has the chance of full-time work at the Good Hotel once graduated) and a foundation in Guatemala providing underprivileged children with an education through the excess profits from hotel stays. This is sustainable staycationing, firmly kicked up a gear.

You wouldn’t think it from the exterior of this grand country mansion, which looks more like a smart hunting lodge than an eco-hotel, but Saorsa 1875 is in fact the UK’s first vegan hotel. Meals here are meticulously planned to avoid waste, electricity is supplied by Ecotricity (the UK’s first certified-vegan electricity supplier) and the hotel’s funky, colourful bedrooms were almost entirely decorated using salvaged and locally sourced furnishings. Even the beds – bedecked with down-free duvets – are 100 per cent guilt-free, making them all the more comfy.