Why that’s almost to the Moon and back.
Hold on, 40,000m is 40km is 24.8 miles
Now I don’t know how much of South East’s network already has ‘conductor rail heating’ But I would imagine over the whole network an increase of 24 miles is a spit in a bucket.
I wonder why they didn’t go with ‘and add 40,000,000mm of conductor rail heating’
Much like when they converted selling petrol by Gallons to Litres, If you turn it into Metric you can get away with any old bollocks.