London's hottest Tube lines revealed as pop-up sauna appears in carriage
- Posted on June 25, 2026
- By The Daily Star
- 0 Views
- 1 min read
London's hottest Tube lines revealed as pop-up sauna appears in carriage
London's commuters have had their say and named the five hottest Tube lines that really make us sweaty during hot weather - with one runaway winner
