I have taken the Eurostar between London and Paris 3 times in the last 6 weeks or so. I have been registered in to the EES Multiple times because there seems to be inconsistencies in the guidelines with some agents saying you need to register each time. My job involves European travel a lot so have been through varying levels of efficiency in different countries in the last several months.
2 weeks ago coming back from France (so after EES officially kicked in) I went straight to the e-gates and went through the EES gates with no problem (scanned my passport and walked through, took my picture, on with my day). I was through in about 30 seconds.
Today, at Gare Du Nord, the EES person directing people stopped me and told me I need to go to EES registration again and that I had to do it every time. I told her I have already registered several times and she wasn't changing her mind so ultimately I went to go register again. She said that the police have told them everyone needs to go through every time.
The sign she pointed me to is specifically marked "pre-registration" which implies only needing to do it once. I had to scan my finger prints and take a photo again. Luckily the queue wasn't very long.
Does anyone know what the actual guidance is? Do we need to go to the kiosks each time? Just seems like this whole rollout has not been handled very well.