It isn't just building materials that are in short supply with rising prices.

It is the same with metals and plastics. I use quite a lot of steel and prices are forecast to move from circa £600/tonne at the start of the year to over £950/tonne by June. Availability of skilled labour has also tightened up, although it may be the continued availability of the furlough scheme that is resulting in a reluctance to move.

The chancellors anticipated boom may run out of steam sooner than he thinks if these pressures continue.