One of these has caused severe damage to the historic Eskmeals Viaduct.
Witness David Moore, Fire Brigade watch manager at Seascale said "The 200 metre long viaduct was burning in three places, including right in the middle. Approximately 100 square metres of timber sleepers were burned.”
Repairing the damage is likely to cost several hundreds of thousands of pounds. If you see this man please inform Network Rail, who are very keen not to talk to him, if possible, ever again.