There are also concerns about the availability of basic building materials including bricks and timber.

Hollowed out by the timber industry’s decline, Blue Lake has long been searching for a new identity.

The roof’s restoration required timber from more than 1500 oak trees.

But some of the UK's biggest mortgage firms are reluctant to deal with homes with spray foam insulation due to concerns over poor fittings leaving moisture trapped and roof timbers at risk of decay.

The roof timbers, for example, are now protected with sprinklers and partitioning.