Almost as long ago I was helping build stuff on a hippy farm in New Hampshire and we clad one building in wood from a salvaged grain silo. The windows were all random salvage too. It ended up looking mint - rustic Bauhaus.
If you have the tools it might be better to get friendly with local parks maintenance / tree surgeons and cut your own, and either use it green or wait a year or two.
Something like that might be perfect.
I live in Lewisham though.
Almost as long ago I was helping build stuff on a hippy farm in New Hampshire and we clad one building in wood from a salvaged grain silo. The windows were all random salvage too. It ended up looking mint - rustic Bauhaus.