In six months, she lined the walls with wool fibre, installed a wood-burning stove, state-of-the-art double-glazing, a rainwater-harvesting system and solar panels.

This has 100 per cent natural wool fibre pellets and prevents slugs from reaching your plants.

Mordants often leave residue in wool fibre that makes it difficult to spin, so wool was generally dyed after spinning, as yarn or woven cloth.

Some wool fibres can be quite rough, but will soften with wear.

Wool fibres are breathable, meaning they can absorb and release moisture without reducing thermal performance, unlike fibreglass-based products.