Our hotel will be very close to Brussels Central and I understand when we arrive at Brussels Midi that our ES ticket will be good to get on any IC train from Midi to Central.
1) When we get to Brussels from London, will we get a passport stamp before leaving the station?
2) On the day we leave, does Central station have its own security and passport control where we would only need to change trains at Midi?
3) What time should we leave from Central to get to Midi if we want to make the 07:28 Thalys 9401 train comfortably?
4) Should we use local transit to get back to Midi and go through security/passport control there instead?