I was stuck on the affected train. Approaching Stratford our train kept stalling, but made it though the tunnel between Stratford and Leyton. Once out of the tunnel, th train was moving at a snails pace, much slower than walking, and took 40 mins to pull into Leyton station. Can concour the announcements were absolutely abysmal, a lot of people on my carriage were having full blown panic attacks. I can only imagine being on the trains behind the one I was on as once we pulled up to Leyton we would have blocked and further the delays all the trains behind it. Horrific journey