There was torrential rain on Friday causing widespread flooding, especially bad in Exeter and on the Isle of Wight. That led to a bridge being "swept away" (allegedly) by the river Creedy, near Newton St Cyres, cutting the line to Crediton. It can't have been a big bridge as the repair took a week (but then the Creedy isn't a big river). Another bridge, on the Exmouth branch at Exton, was also damaged.
The landslip at Honiton (and a smaller one the Axminster side of Seaton Jn.) happened early on Saturday 1st. The newspaper train ploughed into that soon after it happened, at 4:30 a.m. The second, up, line was still being dug out on 5th, but I can't find any report of its reopening. I guess reporters were not interested in the difference between a full service and one reduced by single line working.
And then on 6th there was more heavy rain causing some flooding, though fortunately only locally. And that's what we had before (most) climate change.