We travelled with our folding e-bike for a cycling holiday in France with no problems on the way out, but on return it was not allowed on the train

At the end of August my partner and I went on a cycling holiday in France with our folding e-bikes. We travelled by Eurostar and had no problems on the way out.

However, on the return journey we were stopped by security at Paris Gare du Nord and told our batteries would not be allowed on the train as “they were at risk of exploding”.