One key question is that with the construction of the Elizabeth line, and this being a known issue how was that designed and built differently to solve this pro

One key question is that with the construction of the Elizabeth line, and this being a known issue how was that designed and built differently to solve this problem, assuming it has fixed it. Update: There’s not a huge amount, but with careful search term tweaking I did find this on the Elizabeth line thermal loads: https://learninglegacy.crossrail.co.uk/documents/the-design-of-thermal-tunnel-energy-segments-for-crossrail/ https://learninglegacy.crossrail.co.uk/documents/the-design-...